-74.25% is the change from 501 to 129
Calculation steps:
[( 129 - 501 ) ÷ 501] x 100 = -74.25%
Formula
Percentage change = [(129 - 501) / 501] x 100
Subtract the new number by the original number
129 - 501 = -372
-372 ÷ 501 = -0.7425149700598802
-0.7425149700598802 x 100 = -74.25%