237.6% is the change from 242 to 817
Calculation steps:
[( 817 - 242 ) ÷ 242] x 100 = 237.6%
Formula
Percentage change = [(817 - 242) / 242] x 100
Subtract the new number by the original number
817 - 242 = 575
575 ÷ 242 = 2.37603305785124
2.37603305785124 x 100 = 237.6%