SOLUTION: Jason got a 7 5 on a math test. He was allowed to go to the math lab and take a retest. He increased his score to 84. What was the percent of increase?

Algebra ->  Algebra  -> Percentages: Solvers, Trainers, Word Problems and pie charts -> SOLUTION: Jason got a 7 5 on a math test. He was allowed to go to the math lab and take a retest. He increased his score to 84. What was the percent of increase?      Log On

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Question 4194: Jason got a 7 5 on a math test. He was allowed to go to the math lab and take a retest. He increased his score to 84. What was the percent of increase?
Answer by rapaljer(4667) About Me  (Show Source):
You can put this solution on YOUR website!
Percent of increase always equals the amount of increase divided by the ORIGINAL amount.

Amount of increase = 84-75 which is 9.

Percent of increase = 9%2F75+ which reduces to 3%2F25. Percent means "per hundred", so it's helpful to get the denominator of the fraction up to 100. You can do that by multiplying numerator and denominator by 4:
+%283%2F25%29+%2A%284%2F4%29+=+12%2F100 or 12 %.

R^2 at SCC