882.5% is the change from 40 to 393
Calculation steps:
[( 393 - 40 ) ÷ 40] x 100 = 882.5%
Formula
Percentage change = [(393 - 40) / 40] x 100
Subtract the new number by the original number
393 - 40 = 353
353 ÷ 40 = 8.825
8.825 x 100 = 882.5%
Example