-43.09% is the change from 550 to 313
Calculation steps:
[( 313 - 550 ) ÷ 550] x 100 = -43.09%
Formula
Percentage change = [(313 - 550) / 550] x 100
Subtract the new number by the original number
313 - 550 = -237
-237 ÷ 550 = -0.4309090909090909
-0.4309090909090909 x 100 = -43.09%