-7.68% is the change from 664 to 613
Calculation steps:
[( 613 - 664 ) ÷ 664] x 100 = -7.68%
Formula
Percentage change = [(613 - 664) / 664] x 100
Subtract the new number by the original number
613 - 664 = -51
-51 ÷ 664 = -0.07680722891566265
-0.07680722891566265 x 100 = -7.68%