What is the percent of increase from 106 miles to 122 miles?

85%

115%

15%

185%

15%

To calculate the percent of increase, use the formula:
((New Value - Original Value) / Original Value) * 100%
((122 - 106) / 106) * 100% = (16 / 106) * 100% = 0.15 * 100% = 15%