I need help on math asap! plz! I am in a sixth grade gifted math class?

Question

I don't understand how to: 1.relate decimals fractions and percents
2.Find percents e.x. what percent of 162 is 90
3.Find a number when the percent is known e.x. 36 is 4% of what number
4. overall eny thing about percent increase and decrease
5. Estimating qith percents and
6.applications of percents

If you could help even a little that would be great!

I can't chose who has the best answer although I like sarah's thanks to all!

I DID NOT MEANT QUITH i MENT WITH

It is a final from the begining of the year and I don't remember p.s. I am a 11 year old girl my "avatar" just messed up

Answer 1

1. ex. 1/2= 0.5= 50% The percent is the decimal rounded up to the hundredth place.
2.divide 90 by 162. The decimal is your percentage.
3. multiply on a calculator: 36 x 4% and that will give you your answer.

Answer 2

1. Ok relating decimals fractions and percents is just finding equivilents, or things that are equal.
Lets say you had the fraction: 1/2, the percentage equal to that would be 50% and the decimal would be .5 . Why do all these numbers relate? Because they are all equal to half. I will prove it 1/2 is half of 1. That ones easy. 50% is half of 100%. And lastly .5 is half of one. You see how these are related now?

2. Ok this one will be hard to explain by typing. But I will try. First you need to set up a fraction. The fraction will be 90/160. Now, I don't know if you know this yet but all percents are expressed as x/100. (x is a variable wich is just a number that is not yet determined) So you need to see what percent of 90/160. Well if you write that fraction next to the other one (using x as the numerator) that is setting up an equivilent fraction. So you can cross multiply to find x. In this problem you would do 90 times 100. (thats the cross multiplying part) Then you divide it by 160. This wil give you x,wich is the percent. I am sorry if this is confusing but it is hard to explain by typing I would reccomend writing it out as you go along.

3. For this it is similar to 2. You will set up equivilent fractions. 4/100 equals x/36. Again you will use cross multiplication. You will multiply 4 times 36, and then divide that by 100. This will leave you with the "of what number" part.

4. When percents increase this means the number of something is getting larger. If I have 50% of the stundents that are coming to the bakesale I have half. If that perrcent increases to 100% I will have all the kids that are coming to the bake sale.

I hope these will help, but I have to go! Sorry

Answer 3

1. Try out this website
http://www.mccc.edu/~kelld/CompFDP.htm
It shows you a step by step process in relating fractions, decimals and percents.
2. To find a percent, you need to use division. In your example, you are looking for the percentage of 90 as to 162. This means the whole is 162 and 90 is the portion of that. 162 is the divisor and 90 is the dividend. Your quotient would reflect a number less than 1 which is 0.5555 (a decimal). Multiply this by 100 and you get the percentage of 55.55%
3. In finding the whole number when the percent is given, first determine the given information. 36 is part of the whole. 4% is also part of the whole. In percents, one whole is represented by 100%, which means you need to find the whole number in which 36 is part of. Let me show you a solution which I use in these type of questions.
It's in a form of a fraction. 36/? = 4% / 100%. The ? is what we're looking for. Cross multiply the two fractions, which would turn out to be as follows:
36 x 100% = 4% x ? continuing the process,
36 = 4% x ?. for us to get the ? we need to remove the 4%. The opposite of multiplication is division, so we divide the 4% on both sides of the equation.
36/ 4% = 4% x ? / 4%, this would come out as
36 / 4% = ? . If you do not have a calculator, just turn the 4% into a decimal by dividing it by 100%, we come up with .04. Use your dividing skills, the quotient is the answer which should be 900. If you want to check, just multiply 900 by .04 or 4%. You should get 36.
4. try going to this website at
http://www.dtc.dla.mil/qa/PID.htm
It explains the increase and decreases in percents
5. I didn't get what qith percents mean
6. By application, you mean practical application? If so, then we use percents in business reports, like what is the percent of profit to total sales and what percent is the mark-up on a specific product, etc. In industrial aspects such as production, percentages are used a great deal to tell the performance of a machine or a worker, e.g. Is the machine operating at a 100% capacity. It is also used to tell the quality of a product like the ones written on shirts saying 100% cotton.

Hope this would help... and good luck...

Answer 4

2. set theses up as a ratio and cross multiply

x/100:90/162

100*90 is 9000

9000/162=55.56

answer 55.56%

3 again set up the ratio, just put the x in the part that is unknown

4/100: 36/x

36*100 is 3600

3600/4 is 900

the other questions I do not understand what you are looking for, but estimating, there are all kinds of tricks. Common amounts to deal with are usually low, 5%, 10%. If you are a bad boy and don't pay your credit cards, you might be familiar with 25% or 30%. For 10% just move the decimal point over one. 10% of 100 is 10. For 5%, just halve that..

???? This is advanced math for 6th graders?

Answer 5

1.
1/1 = 1 = 100%
1/2 = 0.5 = 50%
1/3 = 0.33 = 33%
1/4 = 0.25 = 25%
1/5 = 0.2 = 20%
1/6 = 0.17 = 17%
1/7 = 0.14 = 14%

2.
90/162 = 0.555 x 100% = 55.5%

3.
let x be the unknown
36 / x = 4%
4% = 0.04
so:
36 / x = 0.04
0.04x = 36
x=900

4.
um...wat?

5.
wats a qith?

6. percentages are used in any application dealing with growth, decay, composition, statistics, etc.

Answer 6

General principles:
decimals are moved to the right two places to transform to percent: example: .25 = 25% or .01 = 1%

Smaller number divided by larger number multiplied by 100 equals percent: example: 25 divided by 50 = .5 x 100=50%; Use this formula to find answers to the problems you posed.

Answer 7

"partition down the middle" ability partition is the two the comparable length as backyard or comparable width as backyard. "perimeter" ability two times length and two times width. "complete length of fencing" ability length of perimeter and partition. putting all of it mutually: Perimeter = 2W + 2L in view that we don't understand no count if the partition is down the width or length, enable's see if the dimensions of fencing will grant a clue. If the partition is down the dimensions, the partition is 30 ft long and the subject is achieved. If the partition is down the width, we could resolve for W 37 = 3W + 2L and L = 10 yards. 37 = 3W + 20 17 = 3W W = 17/3 yards = 17 ft