-74.6% is the change from 504 to 128
Calculation steps:
[( 128 - 504 ) ÷ 504] x 100 = -74.6%
Formula
Percentage change = [(128 - 504) / 504] x 100
Subtract the new number by the original number
128 - 504 = -376
-376 ÷ 504 = -0.746031746031746
-0.746031746031746 x 100 = -74.6%