780% is the change from 40 to 352
Calculation steps:
[( 352 - 40 ) ÷ 40] x 100 = 780%
Formula
Percentage change = [(352 - 40) / 40] x 100
Subtract the new number by the original number
352 - 40 = 312
312 ÷ 40 = 7.8
7.8 x 100 = 780%
Example