-27.9% is the change from 828 to 597
Calculation steps:
[( 597 - 828 ) ÷ 828] x 100 = -27.9%
Formula
Percentage change = [(597 - 828) / 828] x 100
Subtract the new number by the original number
597 - 828 = -231
-231 ÷ 828 = -0.27898550724637683
-0.27898550724637683 x 100 = -27.9%