The price of a particular car this year is $21,020. This is 7% more than last year's price. What was last year's price, to the nearest cent?
2006-12-29 14:04:58 · 15 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
7% less than what it is now, so, minus 7% from 100% and get 93%, which equals .93
Now you can multiply this year's price by 93% and get what the price would be if it was 7% less last year.
21020(.93) = 19548.60
Don't do your own homework, it doesn't help you in the future, trust me.
2006-12-29 14:08:22 · answer #1 · answered by Anonymous · 1⤊ 0⤋
All percent problems can be solved as porportions. Here you have this year's price / last year's price = (100 + 7)/100 or
21020 / last years price = 107/100
Product of the means (middle numbers ) = product of the extremes (outside numbers) so
last year's price x 107 = 21020 x 100
Solve for last year's price by dividing by 107 and you get
last year's price = (21020x100)/107 ~= $19644.86
Hope this helps you see how to do this. For more info see
http://amby.com/educate/math/4-2_prop.html
(See other things on that homepage also, they explain a few related ideas very well, with much better text editing than I can do here.)
Really, you need to understand how to do this for youreself, otherwise a used car dealer could cheat you!
2006-12-29 22:08:51 · answer #2 · answered by Joni DaNerd 6 · 0⤊ 0⤋
take 21020 x 93% since its 7% less than 100% n you end up with $19,548.60
2006-12-29 22:42:13 · answer #3 · answered by im2good4foolz 1 · 0⤊ 0⤋
21020 = 21020 - 7%
21020 = 21020 - (21020 x .07)
21020 = 21020 - 1471.40
21020 - 1471.40 = 19548.60 = last year price
2006-12-29 22:14:27 · answer #4 · answered by David C 2 · 0⤊ 0⤋
21020 *.07 =1471.40
21020 - 1471.40 = 19548.60 Ans.
I am the first person who showed the work and gave answer
10 points please.thank you
2006-12-29 22:09:34 · answer #5 · answered by Dfirefox 6 · 0⤊ 1⤋
I don't know but must be some cheap a$s car!
2006-12-29 22:12:41 · answer #6 · answered by LindaLou 7 · 1⤊ 0⤋
P(now) = P(then)(r)^1
21020 = P(then)(1.007)
(21020)/(1.007) = P(then)
20873.8828 = P(then)
Ao the price last year was $20,873.88.
2006-12-29 22:10:29 · answer #7 · answered by stewartlucas467 2 · 0⤊ 1⤋
Do your own homework. It will help you in the future.
2006-12-29 22:06:43 · answer #8 · answered by farmhand 2 · 1⤊ 1⤋
21020 = x (1 + 0.07)
x = 21020 / 1.07 = 19644.86
2006-12-29 22:41:15 · answer #9 · answered by Johnny Handsome 2 · 1⤊ 0⤋
hahah your all saying do your homework but two out of three of you got it wrong!
2006-12-29 22:13:54 · answer #10 · answered by kky 3 · 0⤊ 1⤋