-50.27% is the change from 549 to 273
Calculation steps:
[( 273 - 549 ) ÷ 549] x 100 = -50.27%
Formula
Percentage change = [(273 - 549) / 549] x 100
Subtract the new number by the original number
273 - 549 = -276
-276 ÷ 549 = -0.5027322404371585
-0.5027322404371585 x 100 = -50.27%