810% is the change from 40 to 364
Calculation steps:
[( 364 - 40 ) ÷ 40] x 100 = 810%
Formula
Percentage change = [(364 - 40) / 40] x 100
Subtract the new number by the original number
364 - 40 = 324
324 ÷ 40 = 8.1
8.1 x 100 = 810%
Example