3700% is the change from 20 to 760
Calculation steps:
[( 760 - 20 ) ÷ 20] x 100 = 3700%
Formula
Percentage change = [(760 - 20) / 20] x 100
Subtract the new number by the original number
760 - 20 = 740
740 ÷ 20 = 37
37 x 100 = 3700%
Example