-7.12% is the change from 660 to 613
Calculation steps:
[( 613 - 660 ) ÷ 660] x 100 = -7.12%
Formula
Percentage change = [(613 - 660) / 660] x 100
Subtract the new number by the original number
613 - 660 = -47
-47 ÷ 660 = -0.07121212121212121
-0.07121212121212121 x 100 = -7.12%