-76.36% is the change from 660 to 156
Calculation steps:
[( 156 - 660 ) ÷ 660] x 100 = -76.36%
Formula
Percentage change = [(156 - 660) / 660] x 100
Subtract the new number by the original number
156 - 660 = -504
-504 ÷ 660 = -0.7636363636363637
-0.7636363636363637 x 100 = -76.36%