-49.18% is the change from 490 to 249
Calculation steps:
[( 249 - 490 ) ÷ 490] x 100 = -49.18%
Formula
Percentage change = [(249 - 490) / 490] x 100
Subtract the new number by the original number
249 - 490 = -241
-241 ÷ 490 = -0.49183673469387756
-0.49183673469387756 x 100 = -49.18%