-85.58% is the change from 520 to 75
Calculation steps:
[( 75 - 520 ) ÷ 520] x 100 = -85.58%
Formula
Percentage change = [(75 - 520) / 520] x 100
Subtract the new number by the original number
75 - 520 = -445
-445 ÷ 520 = -0.8557692307692307
-0.8557692307692307 x 100 = -85.58%