-89.64% is the change from 550 to 57
Calculation steps:
[( 57 - 550 ) ÷ 550] x 100 = -89.64%
Formula
Percentage change = [(57 - 550) / 550] x 100
Subtract the new number by the original number
57 - 550 = -493
-493 ÷ 550 = -0.8963636363636364
-0.8963636363636364 x 100 = -89.64%