75.42% is the change from 240 to 421
Calculation steps:
[( 421 - 240 ) ÷ 240] x 100 = 75.42%
Formula
Percentage change = [(421 - 240) / 240] x 100
Subtract the new number by the original number
421 - 240 = 181
181 ÷ 240 = 0.7541666666666667
0.7541666666666667 x 100 = 75.42%