-72.55% is the change from 550 to 151
Calculation steps:
[( 151 - 550 ) ÷ 550] x 100 = -72.55%
Formula
Percentage change = [(151 - 550) / 550] x 100
Subtract the new number by the original number
151 - 550 = -399
-399 ÷ 550 = -0.7254545454545455
-0.7254545454545455 x 100 = -72.55%