-75.58% is the change from 520 to 127
Calculation steps:
[( 127 - 520 ) ÷ 520] x 100 = -75.58%
Formula
Percentage change = [(127 - 520) / 520] x 100
Subtract the new number by the original number
127 - 520 = -393
-393 ÷ 520 = -0.7557692307692307
-0.7557692307692307 x 100 = -75.58%