-28.42% is the change from 549 to 393
Calculation steps:
[( 393 - 549 ) ÷ 549] x 100 = -28.42%
Formula
Percentage change = [(393 - 549) / 549] x 100
Subtract the new number by the original number
393 - 549 = -156
-156 ÷ 549 = -0.28415300546448086
-0.28415300546448086 x 100 = -28.42%