-84.82% is the change from 593 to 90
Calculation steps:
[( 90 - 593 ) ÷ 593] x 100 = -84.82%
Formula
Percentage change = [(90 - 593) / 593] x 100
Subtract the new number by the original number
90 - 593 = -503
-503 ÷ 593 = -0.8482293423271501
-0.8482293423271501 x 100 = -84.82%