117.08% is the change from 240 to 521
Calculation steps:
[( 521 - 240 ) ÷ 240] x 100 = 117.08%
Formula
Percentage change = [(521 - 240) / 240] x 100
Subtract the new number by the original number
521 - 240 = 281
281 ÷ 240 = 1.1708333333333334
1.1708333333333334 x 100 = 117.08%