-77.29% is the change from 828 to 188
Calculation steps:
[( 188 - 828 ) ÷ 828] x 100 = -77.29%
Formula
Percentage change = [(188 - 828) / 828] x 100
Subtract the new number by the original number
188 - 828 = -640
-640 ÷ 828 = -0.7729468599033816
-0.7729468599033816 x 100 = -77.29%