-52.5% is the change from 120 to 57
Calculation steps:
[( 57 - 120 ) ÷ 120] x 100 = -52.5%
Formula
Percentage change = [(57 - 120) / 120] x 100
Subtract the new number by the original number
57 - 120 = -63
-63 ÷ 120 = -0.525
-0.525 x 100 = -52.5%
Example