-43.71% is the change from 977 to 550
Calculation steps:
[( 550 - 977 ) ÷ 977] x 100 = -43.71%
Formula
Percentage change = [(550 - 977) / 977] x 100
Subtract the new number by the original number
550 - 977 = -427
-427 ÷ 977 = -0.43705220061412486
-0.43705220061412486 x 100 = -43.71%