how do i work out percentages?

Answer 1

The formula for percentage is

Amount = Base x Percent

Find the amount when the base and percent are known

60% of 20 equals what amount

First convert the percent to decimal

remove the % sign. Divide 60 by 100 to get the decimal.

60 / 100 = 0.6

Multiply the 20 by the decimal

20 x 0.6 = 12

The amount is 12

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Finding the base when the amount and percent are known.

amount / percent = base

12 is 60 % of what number

First convert 60% to decimal

Remove the % sign. Divide 60 by 100 to get the decimal

60 / 100 = 0.6

Divide 12 by the decimal to get the base

12 / 0.6 = 20

The base if 20

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Finding the percent when the amount and base are known

amount / base = percent

12 is what percent of 20 ?

Divide the amount by the base to get percent

12 / 20 = 0.6

Multiply the decimal by 100 and attach the % sign

0.6 x 100 = 60 %

The percent = 60%

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Click on the URL below for additional information concerning amount,base and percent

www.themathpage.com/ARITH/percent-with-a-calculator.htm

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Answer 2

A few examples may be helpful:-
Example 1
Test result = 30/50 which becomes 30/50 x 100% = 60%

Example 2
10% reduction in price of a £12,000 car wil be given by 10/100 x 12,000 = £120
Sale price = £12,000 - £120 = £11,880

Example 3
Well known percentages are :-
a) 10% = 10/100 =1/10
b) 20% = 20/100 = 1/5
c) 33(1/3)% =33(1/3) /100 = 100/300 = 1/3
d) 50% = 50/100 = 1/2

Example 4
Calculate 33(1/3) % of £360.99
= (1/ 3) x £360.99 = £120.33

Hope above examples give you a start.

Answer 3

"percent", when we break it it becomes per cent
cent means 100
so percent means out of 100

multiply the fraction with 100
like
u want to find out how much 20/40 makes in percentage then

20/40 x 100 = 50%

or 30/75

30/75 x 100 = 40%

Answer 4

divide your number by 100 then multiply by the percentage, so if you want 17% of 45 you take 45 divide by 100 then multiply by 17= 7.65%

Answer 5

OK my boy, think of it like this

% means out of a hundred,

so any number you divide by 100 is 1% (ie. 340 divided by 100 is 3.4 - which is 1% of 340)

So after you have divided and found 1%, then you can times that by the percent you are looking for to find the answer.


Is that helpful?

Answer 6

get the rate by dividing, to get unit value, then multiply by hundred! value per hundred is the percentage!

Answer 7

tAKE THE SMALLER PORTION, DIVIDE IT BY THE LARGER PORTION AND MULTIPLY BY 100 AND CANCEL OUT THE RESULTING FRACTION. aLTERNATIVELY IF YOU NEED A PARTICULAR % OF A FIGURE, SAY 60%, THEN MULTIPLY THE FIGURE BY 0.6

Answer 8

Say you need to work out 5% of 25.

25 x 5 = 125
125 / 100 = 1.25
25+1.25= 26.25

Answer 9

calculator!