-45.27% is the change from 455 to 249
Calculation steps:
[( 249 - 455 ) ÷ 455] x 100 = -45.27%
Formula
Percentage change = [(249 - 455) / 455] x 100
Subtract the new number by the original number
249 - 455 = -206
-206 ÷ 455 = -0.45274725274725275
-0.45274725274725275 x 100 = -45.27%