68.75% is the change from 240 to 405
Calculation steps:
[( 405 - 240 ) ÷ 240] x 100 = 68.75%
Formula
Percentage change = [(405 - 240) / 240] x 100
Subtract the new number by the original number
405 - 240 = 165
165 ÷ 240 = 0.6875
0.6875 x 100 = 68.75%