-50.61% is the change from 490 to 242
Calculation steps:
[( 242 - 490 ) ÷ 490] x 100 = -50.61%
Formula
Percentage change = [(242 - 490) / 490] x 100
Subtract the new number by the original number
242 - 490 = -248
-248 ÷ 490 = -0.5061224489795918
-0.5061224489795918 x 100 = -50.61%