-84.13% is the change from 523 to 83
Calculation steps:
[( 83 - 523 ) ÷ 523] x 100 = -84.13%
Formula
Percentage change = [(83 - 523) / 523] x 100
Subtract the new number by the original number
83 - 523 = -440
-440 ÷ 523 = -0.8413001912045889
-0.8413001912045889 x 100 = -84.13%