-42.55% is the change from 550 to 316
Calculation steps:
[( 316 - 550 ) ÷ 550] x 100 = -42.55%
Formula
Percentage change = [(316 - 550) / 550] x 100
Subtract the new number by the original number
316 - 550 = -234
-234 ÷ 550 = -0.4254545454545455
-0.4254545454545455 x 100 = -42.55%