-49.39% is the change from 492 to 249
Calculation steps:
[( 249 - 492 ) ÷ 492] x 100 = -49.39%
Formula
Percentage change = [(249 - 492) / 492] x 100
Subtract the new number by the original number
249 - 492 = -243
-243 ÷ 492 = -0.49390243902439024
-0.49390243902439024 x 100 = -49.39%