Question

Last year, Abe went bowling several times and earned an average score of 90 points. This year, after taking a class at school, he improved his score to an average of 99 points. What is the percent of increase in Abe's average score?

A) 9%
B) 10%
C) 11%
D) 12%

Answer 1

B) 10%. To find the percent increase in Abe's average score, we subtract his old average score from his new average score, divide the difference by his old average score, and convert it to a percentage.

Step-by-step explanation:

To calculate the percent increase in Abe's average score, we need to find the difference between his scores and then divide it by his initial average score. Here are the steps:

1. Calculate the difference between his new average score and his old average score: 99 - 90 = 9.
2. Divide the difference by his old average score: 9 / 90 = 0.10.
3. Convert the decimal to a percentage by multiplying by 100: 0.10 * 100 = 10%.

Therefore, the percent increase in Abe's average score is 10% (option B).