On Mark’s first day, he ran 5 laps of the track without stopping. After training for several weeks, he was able to run 9 laps without stopping. To the nearest percent, what is the percent increase from Mark’s first run to his most recent?

Answer 1

The percent increase can be calculated using the following formula:

Percent Increase = ((New Value - Old Value) / Old Value) x 100

Old Value = 5 laps
New Value = 9 laps

Percent Increase = ((9 - 5) / 5) x 100
Percent Increase = (4 / 5) x 100
Percent Increase = 0.8 x 100
Percent Increase = 80%

Therefore, the percent increase from Mark's first run to his most recent run is 80%.