-72.91% is the change from 550 to 149
Calculation steps:
[( 149 - 550 ) ÷ 550] x 100 = -72.91%
Formula
Percentage change = [(149 - 550) / 550] x 100
Subtract the new number by the original number
149 - 550 = -401
-401 ÷ 550 = -0.7290909090909091
-0.7290909090909091 x 100 = -72.91%