-70.36% is the change from 550 to 163
Calculation steps:
[( 163 - 550 ) ÷ 550] x 100 = -70.36%
Formula
Percentage change = [(163 - 550) / 550] x 100
Subtract the new number by the original number
163 - 550 = -387
-387 ÷ 550 = -0.7036363636363636
-0.7036363636363636 x 100 = -70.36%