-26.87% is the change from 815 to 596
Calculation steps:
[( 596 - 815 ) ÷ 815] x 100 = -26.87%
Formula
Percentage change = [(596 - 815) / 815] x 100
Subtract the new number by the original number
596 - 815 = -219
-219 ÷ 815 = -0.2687116564417178
-0.2687116564417178 x 100 = -26.87%