-7.22% is the change from 831 to 771
Calculation steps:
[( 771 - 831 ) ÷ 831] x 100 = -7.22%
Formula
Percentage change = [(771 - 831) / 831] x 100
Subtract the new number by the original number
771 - 831 = -60
-60 ÷ 831 = -0.07220216606498195
-0.07220216606498195 x 100 = -7.22%