-30.18% is the change from 550 to 384
Calculation steps:
[( 384 - 550 ) ÷ 550] x 100 = -30.18%
Formula
Percentage change = [(384 - 550) / 550] x 100
Subtract the new number by the original number
384 - 550 = -166
-166 ÷ 550 = -0.3018181818181818
-0.3018181818181818 x 100 = -30.18%