-74.37% is the change from 831 to 213
Calculation steps:
[( 213 - 831 ) ÷ 831] x 100 = -74.37%
Formula
Percentage change = [(213 - 831) / 831] x 100
Subtract the new number by the original number
213 - 831 = -618
-618 ÷ 831 = -0.7436823104693141
-0.7436823104693141 x 100 = -74.37%