-74.25% is the change from 831 to 214
Calculation steps:
[( 214 - 831 ) ÷ 831] x 100 = -74.25%
Formula
Percentage change = [(214 - 831) / 831] x 100
Subtract the new number by the original number
214 - 831 = -617
-617 ÷ 831 = -0.7424789410348978
-0.7424789410348978 x 100 = -74.25%