-84% is the change from 550 to 88
Calculation steps:
[( 88 - 550 ) ÷ 550] x 100 = -84%
Formula
Percentage change = [(88 - 550) / 550] x 100
Subtract the new number by the original number
88 - 550 = -462
-462 ÷ 550 = -0.84
-0.84 x 100 = -84%
Example