-27.89% is the change from 771 to 556
Calculation steps:
[( 556 - 771 ) ÷ 771] x 100 = -27.89%
Formula
Percentage change = [(556 - 771) / 771] x 100
Subtract the new number by the original number
556 - 771 = -215
-215 ÷ 771 = -0.2788586251621271
-0.2788586251621271 x 100 = -27.89%