16400% is the change from 4 to 660
Calculation steps:
[( 660 - 4 ) ÷ 4] x 100 = 16400%
Formula
Percentage change = [(660 - 4) / 4] x 100
Subtract the new number by the original number
660 - 4 = 656
656 ÷ 4 = 164
164 x 100 = 16400%
Example