While racing around the track last week, Marco was able to get to 120 mph. This week Marco tried again and was able to reach 135 mph. What was the percentage increase from last week to this week?
Responses
A 15%15%
B 10%10%
C 12.5%12.5%
D 17.5%
To find the percentage increase, we first need to calculate the difference between the two speeds:
135 mph - 120 mph = 15 mph.
Then we divide the difference by the initial speed (last week's speed) and multiply by 100 to get the percentage increase:
(15 mph / 120 mph) * 100 = 12.5%.
Therefore, the correct answer is C) 12.5%.