-83.37% is the change from 523 to 87
Calculation steps:
[( 87 - 523 ) ÷ 523] x 100 = -83.37%
Formula
Percentage change = [(87 - 523) / 523] x 100
Subtract the new number by the original number
87 - 523 = -436
-436 ÷ 523 = -0.8336520076481836
-0.8336520076481836 x 100 = -83.37%