-74.45% is the change from 501 to 128
Calculation steps:
[( 128 - 501 ) ÷ 501] x 100 = -74.45%
Formula
Percentage change = [(128 - 501) / 501] x 100
Subtract the new number by the original number
128 - 501 = -373
-373 ÷ 501 = -0.7445109780439122
-0.7445109780439122 x 100 = -74.45%