-86.91% is the change from 550 to 72
Calculation steps:
[( 72 - 550 ) ÷ 550] x 100 = -86.91%
Formula
Percentage change = [(72 - 550) / 550] x 100
Subtract the new number by the original number
72 - 550 = -478
-478 ÷ 550 = -0.8690909090909091
-0.8690909090909091 x 100 = -86.91%