-84.28% is the change from 528 to 83
Calculation steps:
[( 83 - 528 ) ÷ 528] x 100 = -84.28%
Formula
Percentage change = [(83 - 528) / 528] x 100
Subtract the new number by the original number
83 - 528 = -445
-445 ÷ 528 = -0.8428030303030303
-0.8428030303030303 x 100 = -84.28%