-5.4% is the change from 815 to 771
Calculation steps:
[( 771 - 815 ) ÷ 815] x 100 = -5.4%
Formula
Percentage change = [(771 - 815) / 815] x 100
Subtract the new number by the original number
771 - 815 = -44
-44 ÷ 815 = -0.053987730061349694
-0.053987730061349694 x 100 = -5.4%