4087.5% is the change from 16 to 670
Calculation steps:
[( 670 - 16 ) ÷ 16] x 100 = 4087.5%
Formula
Percentage change = [(670 - 16) / 16] x 100
Subtract the new number by the original number
670 - 16 = 654
654 ÷ 16 = 40.875
40.875 x 100 = 4087.5%
Example