-72.23% is the change from 821 to 228
Calculation steps:
[( 228 - 821 ) ÷ 821] x 100 = -72.23%
Formula
Percentage change = [(228 - 821) / 821] x 100
Subtract the new number by the original number
228 - 821 = -593
-593 ÷ 821 = -0.7222898903775883
-0.7222898903775883 x 100 = -72.23%