-17.87% is the change from 677 to 556
Calculation steps:
[( 556 - 677 ) ÷ 677] x 100 = -17.87%
Formula
Percentage change = [(556 - 677) / 677] x 100
Subtract the new number by the original number
556 - 677 = -121
-121 ÷ 677 = -0.17872968980797638
-0.17872968980797638 x 100 = -17.87%