Is there an easy way or shortcut to doing these types of problems............
A small radio is $25.00 but is now marked 20% off. HOw much can be saved by buying at 20% off?
or like this question
Ruth Smithson bought a $30 coat at 25% off. How much did he save.
PLEASE I REALLY, REALLY NEED YOUR HELP TO FIGURE OUT A SHORT WAY TO SOLVE THESE PROBLEMS. OR AT LEAST ANYWAY TO SOLVE THEM AT ALL.
2006-11-14 09:14:11 · 6 answers · asked by Unknown Artist~ 4 in Education & Reference ➔ Homework Help
how do they expect me to change .1 to a percent. They want me to change .60, .17, and some other stuff to percentage. I don't want the answers I just want to know how to solve them PLEASE
2006-11-14 09:26:04 · update #1
$25 x .20 = $5
$30 x .25 = $7.50
That is about the shortest way to them - just change the % to a decimal and multiply, remembering to put the decimal point in the right place. I hope this helps.
2006-11-14 09:18:09 · answer #1 · answered by Anonymous · 4⤊ 0⤋
OK, for percentages, all you need to know is how to get to 10%, and then every other percentage is easy to figure out with just a little multiplication.
For instance: On the first problem, if a $25 radio is 20% off, first figure out what 10% is ($2.50) Then you just multiply that by 2 to get the 20% discount. The answer is that you can save $5.00 by buying it on sale.
On the next one, 25% off a $30 coat- OK, what is 10% of $30. $3!! So multiply that by 2- $6!! Uh-oh, though- what about the other 5% you need to figure out? Easy! What's half of $3?-$1.50! So add that $1.50 to the $6 you already added up, and you will find that the woman will be getting $7.50 off her coat for the sale price of $22.50.
2006-11-14 17:25:42 · answer #2 · answered by fizzygurrl1980 7 · 0⤊ 0⤋
Logically, you'd just multiply the percent off by the original amount to figure out how much you saved.
First question: 25 x 0.2
Second question: 30 x 0.25
2006-11-14 17:22:03 · answer #3 · answered by Someone 4 · 0⤊ 0⤋
just say $25 x 20% (which is .20, just move the decimal over to the left two times.) your answer is how much you saved.
2006-11-14 17:19:19 · answer #4 · answered by Saphira 3 · 0⤊ 0⤋
WAY ONE:
the 1st one is $5.00 just move the decimal over one to the left and mulitiply by 2 if you don't want to cross multiply...
25% is 1/4 so diviude 30 by 4...$7.50
WAY TWO:
cross multiplying is like proportions
........x ........................%
----------------....=....-----------
orig. price...............100
...... x ..............20
----------..=..---------
.....25 ...........100
100x = 20x25
100x = 500
x = 500/100
x = $5
2006-11-14 17:26:18 · answer #5 · answered by Caty 3 · 0⤊ 0⤋
Do the math and stop cheating. I will tell you how to solve it but not the answer.
2006-11-14 17:21:19 · answer #6 · answered by Scott B 4 · 0⤊ 0⤋