-15.82% is the change from 771 to 649
Calculation steps:
[( 649 - 771 ) ÷ 771] x 100 = -15.82%
Formula
Percentage change = [(649 - 771) / 771] x 100
Subtract the new number by the original number
649 - 771 = -122
-122 ÷ 771 = -0.1582360570687419
-0.1582360570687419 x 100 = -15.82%