-50.09% is the change from 549 to 274
Calculation steps:
[( 274 - 549 ) ÷ 549] x 100 = -50.09%
Formula
Percentage change = [(274 - 549) / 549] x 100
Subtract the new number by the original number
274 - 549 = -275
-275 ÷ 549 = -0.5009107468123861
-0.5009107468123861 x 100 = -50.09%