-27.79% is the change from 770 to 556
Calculation steps:
[( 556 - 770 ) ÷ 770] x 100 = -27.79%
Formula
Percentage change = [(556 - 770) / 770] x 100
Subtract the new number by the original number
556 - 770 = -214
-214 ÷ 770 = -0.2779220779220779
-0.2779220779220779 x 100 = -27.79%