38.83% is the change from 515 to 715
Calculation steps:
[( 715 - 515 ) ÷ 515] x 100 = 38.83%
Formula
Percentage change = [(715 - 515) / 515] x 100
Subtract the new number by the original number
715 - 515 = 200
200 ÷ 515 = 0.3883495145631068
0.3883495145631068 x 100 = 38.83%