820% is the change from 40 to 368
Calculation steps:
[( 368 - 40 ) ÷ 40] x 100 = 820%
Formula
Percentage change = [(368 - 40) / 40] x 100
Subtract the new number by the original number
368 - 40 = 328
328 ÷ 40 = 8.2
8.2 x 100 = 820%
Example