SOLUTION: Jamal and his friends are conducting a car wash to raise money for a school play. Over the first weekend they raised $336.00, which was 80% of what they set out to earn. If they co

Algebra ->  Customizable Word Problem Solvers  -> Misc -> SOLUTION: Jamal and his friends are conducting a car wash to raise money for a school play. Over the first weekend they raised $336.00, which was 80% of what they set out to earn. If they co      Log On

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Question 904542: Jamal and his friends are conducting a car wash to raise money for a school play. Over the first weekend they raised $336.00, which was 80% of what they set out to earn. If they collect $21 for each car they wash, how many more cars must they wash?


Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
Re TY
How many more? Yes! 4 more cars. Good work.
.80E = 336
E = 336/.80 = 420
$420 /$21 = 20 cars
336/21 = 16 cars