1820% is the change from 40 to 768
Calculation steps:
[( 768 - 40 ) ÷ 40] x 100 = 1820%
Formula
Percentage change = [(768 - 40) / 40] x 100
Subtract the new number by the original number
768 - 40 = 728
728 ÷ 40 = 18.2
18.2 x 100 = 1820%
Example