-87.95% is the change from 523 to 63
Calculation steps:
[( 63 - 523 ) ÷ 523] x 100 = -87.95%
Formula
Percentage change = [(63 - 523) / 523] x 100
Subtract the new number by the original number
63 - 523 = -460
-460 ÷ 523 = -0.8795411089866156
-0.8795411089866156 x 100 = -87.95%