-50.81% is the change from 492 to 242
Calculation steps:
[( 242 - 492 ) ÷ 492] x 100 = -50.81%
Formula
Percentage change = [(242 - 492) / 492] x 100
Subtract the new number by the original number
242 - 492 = -250
-250 ÷ 492 = -0.508130081300813
-0.508130081300813 x 100 = -50.81%