-5.17% is the change from 813 to 771
Calculation steps:
[( 771 - 813 ) ÷ 813] x 100 = -5.17%
Formula
Percentage change = [(771 - 813) / 813] x 100
Subtract the new number by the original number
771 - 813 = -42
-42 ÷ 813 = -0.05166051660516605
-0.05166051660516605 x 100 = -5.17%