-69.68% is the change from 831 to 252
Calculation steps:
[( 252 - 831 ) ÷ 831] x 100 = -69.68%
Formula
Percentage change = [(252 - 831) / 831] x 100
Subtract the new number by the original number
252 - 831 = -579
-579 ÷ 831 = -0.6967509025270758
-0.6967509025270758 x 100 = -69.68%