7.68% is the change from 664 to 715
Calculation steps:
[( 715 - 664 ) ÷ 664] x 100 = 7.68%
Formula
Percentage change = [(715 - 664) / 664] x 100
Subtract the new number by the original number
715 - 664 = 51
51 ÷ 664 = 0.07680722891566265
0.07680722891566265 x 100 = 7.68%