3700% is the change from 18 to 684
Calculation steps:
[( 684 - 18 ) ÷ 18] x 100 = 3700%
Formula
Percentage change = [(684 - 18) / 18] x 100
Subtract the new number by the original number
684 - 18 = 666
666 ÷ 18 = 37
37 x 100 = 3700%
Example