-25% is the change from 160 to 120
Calculation steps:
[( 120 - 160 ) ÷ 160] x 100 = -25%
Formula
Percentage change = [(120 - 160) / 160] x 100
Subtract the new number by the original number
120 - 160 = -40
-40 ÷ 160 = -0.25
-0.25 x 100 = -25%
Example