-27.56% is the change from 831 to 602
Calculation steps:
[( 602 - 831 ) ÷ 831] x 100 = -27.56%
Formula
Percentage change = [(602 - 831) / 831] x 100
Subtract the new number by the original number
602 - 831 = -229
-229 ÷ 831 = -0.27557160048134777
-0.27557160048134777 x 100 = -27.56%