-24.55% is the change from 550 to 415
Calculation steps:
[( 415 - 550 ) ÷ 550] x 100 = -24.55%
Formula
Percentage change = [(415 - 550) / 550] x 100
Subtract the new number by the original number
415 - 550 = -135
-135 ÷ 550 = -0.24545454545454545
-0.24545454545454545 x 100 = -24.55%