-40.55% is the change from 550 to 327
Calculation steps:
[( 327 - 550 ) ÷ 550] x 100 = -40.55%
Formula
Percentage change = [(327 - 550) / 550] x 100
Subtract the new number by the original number
327 - 550 = -223
-223 ÷ 550 = -0.40545454545454546
-0.40545454545454546 x 100 = -40.55%