220.83% is the change from 240 to 770
Calculation steps:
[( 770 - 240 ) ÷ 240] x 100 = 220.83%
Formula
Percentage change = [(770 - 240) / 240] x 100
Subtract the new number by the original number
770 - 240 = 530
530 ÷ 240 = 2.2083333333333335
2.2083333333333335 x 100 = 220.83%