A student reader is making $7.20 per hour and gets a $0.64 raise. What is the percent increase? (Round to the nearest tenth of a percent.)

100 (.64/7.2)

To calculate the percent increase, we need to find the difference between the new amount and the original amount, and then divide that difference by the original amount. Finally, we multiply the result by 100 to express it as a percentage.

First, let's find the new amount after the raise. We add the raise of $0.64 to the original wage of $7.20:
New amount = $7.20 + $0.64 = $7.84

Next, we find the difference between the new amount and the original amount:
Difference = $7.84 - $7.20 = $0.64

Now, we divide the difference by the original amount:
Percent increase = (Difference / Original amount) × 100
Percent increase = ($0.64 / $7.20) × 100

To round the answer to the nearest tenth of a percent, we need to evaluate the expression:
Percent increase ≈ 8.89%

Therefore, the percent increase in the student reader's wage is approximately 8.9%.