755% is the change from 40 to 342
Calculation steps:
[( 342 - 40 ) ÷ 40] x 100 = 755%
Formula
Percentage change = [(342 - 40) / 40] x 100
Subtract the new number by the original number
342 - 40 = 302
302 ÷ 40 = 7.55
7.55 x 100 = 755%
Example