260.83% is the change from 240 to 866
Calculation steps:
[( 866 - 240 ) ÷ 240] x 100 = 260.83%
Formula
Percentage change = [(866 - 240) / 240] x 100
Subtract the new number by the original number
866 - 240 = 626
626 ÷ 240 = 2.6083333333333334
2.6083333333333334 x 100 = 260.83%