-27.61% is the change from 815 to 590
Calculation steps:
[( 590 - 815 ) ÷ 815] x 100 = -27.61%
Formula
Percentage change = [(590 - 815) / 815] x 100
Subtract the new number by the original number
590 - 815 = -225
-225 ÷ 815 = -0.27607361963190186
-0.27607361963190186 x 100 = -27.61%