-28.99% is the change from 828 to 588
Calculation steps:
[( 588 - 828 ) ÷ 828] x 100 = -28.99%
Formula
Percentage change = [(588 - 828) / 828] x 100
Subtract the new number by the original number
588 - 828 = -240
-240 ÷ 828 = -0.2898550724637681
-0.2898550724637681 x 100 = -28.99%