212.5% is the change from 240 to 750
Calculation steps:
[( 750 - 240 ) ÷ 240] x 100 = 212.5%
Formula
Percentage change = [(750 - 240) / 240] x 100
Subtract the new number by the original number
750 - 240 = 510
510 ÷ 240 = 2.125
2.125 x 100 = 212.5%
Example