-50% is the change from 492 to 246
Calculation steps:
[( 246 - 492 ) ÷ 492] x 100 = -50%
Formula
Percentage change = [(246 - 492) / 492] x 100
Subtract the new number by the original number
246 - 492 = -246
-246 ÷ 492 = -0.5
-0.5 x 100 = -50%
Example