-86% is the change from 593 to 83
Calculation steps:
[( 83 - 593 ) ÷ 593] x 100 = -86%
Formula
Percentage change = [(83 - 593) / 593] x 100
Subtract the new number by the original number
83 - 593 = -510
-510 ÷ 593 = -0.8600337268128162
-0.8600337268128162 x 100 = -86%