3943.75% is the change from 16 to 647
Calculation steps:
[( 647 - 16 ) ÷ 16] x 100 = 3943.75%
Formula
Percentage change = [(647 - 16) / 16] x 100
Subtract the new number by the original number
647 - 16 = 631
631 ÷ 16 = 39.4375
39.4375 x 100 = 3943.75%