-79.42% is the change from 520 to 107
Calculation steps:
[( 107 - 520 ) ÷ 520] x 100 = -79.42%
Formula
Percentage change = [(107 - 520) / 520] x 100
Subtract the new number by the original number
107 - 520 = -413
-413 ÷ 520 = -0.7942307692307692
-0.7942307692307692 x 100 = -79.42%