-93.22% is the change from 590 to 40
Calculation steps:
[( 40 - 590 ) ÷ 590] x 100 = -93.22%
Formula
Percentage change = [(40 - 590) / 590] x 100
Subtract the new number by the original number
40 - 590 = -550
-550 ÷ 590 = -0.9322033898305084
-0.9322033898305084 x 100 = -93.22%