238.84% is the change from 242 to 820
Calculation steps:
[( 820 - 242 ) ÷ 242] x 100 = 238.84%
Formula
Percentage change = [(820 - 242) / 242] x 100
Subtract the new number by the original number
820 - 242 = 578
578 ÷ 242 = 2.3884297520661155
2.3884297520661155 x 100 = 238.84%