-51.31% is the change from 497 to 242
Calculation steps:
[( 242 - 497 ) ÷ 497] x 100 = -51.31%
Formula
Percentage change = [(242 - 497) / 497] x 100
Subtract the new number by the original number
242 - 497 = -255
-255 ÷ 497 = -0.5130784708249497
-0.5130784708249497 x 100 = -51.31%