-56.25% is the change from 128 to 56
Calculation steps:
[( 56 - 128 ) ÷ 128] x 100 = -56.25%
Formula
Percentage change = [(56 - 128) / 128] x 100
Subtract the new number by the original number
56 - 128 = -72
-72 ÷ 128 = -0.5625
-0.5625 x 100 = -56.25%