-87.88% is the change from 520 to 63
Calculation steps:
[( 63 - 520 ) ÷ 520] x 100 = -87.88%
Formula
Percentage change = [(63 - 520) / 520] x 100
Subtract the new number by the original number
63 - 520 = -457
-457 ÷ 520 = -0.8788461538461538
-0.8788461538461538 x 100 = -87.88%