-49.18% is the change from 549 to 279
Calculation steps:
[( 279 - 549 ) ÷ 549] x 100 = -49.18%
Formula
Percentage change = [(279 - 549) / 549] x 100
Subtract the new number by the original number
279 - 549 = -270
-270 ÷ 549 = -0.4918032786885246
-0.4918032786885246 x 100 = -49.18%