-18.76% is the change from 677 to 550
Calculation steps:
[( 550 - 677 ) ÷ 677] x 100 = -18.76%
Formula
Percentage change = [(550 - 677) / 677] x 100
Subtract the new number by the original number
550 - 677 = -127
-127 ÷ 677 = -0.18759231905465287
-0.18759231905465287 x 100 = -18.76%