-77.45% is the change from 550 to 124
Calculation steps:
[( 124 - 550 ) ÷ 550] x 100 = -77.45%
Formula
Percentage change = [(124 - 550) / 550] x 100
Subtract the new number by the original number
124 - 550 = -426
-426 ÷ 550 = -0.7745454545454545
-0.7745454545454545 x 100 = -77.45%