-37.5% is the change from 120 to 75
Calculation steps:
[( 75 - 120 ) ÷ 120] x 100 = -37.5%
Formula
Percentage change = [(75 - 120) / 120] x 100
Subtract the new number by the original number
75 - 120 = -45
-45 ÷ 120 = -0.375
-0.375 x 100 = -37.5%
Example