1600% is the change from 38 to 646
Calculation steps:
[( 646 - 38 ) ÷ 38] x 100 = 1600%
Formula
Percentage change = [(646 - 38) / 38] x 100
Subtract the new number by the original number
646 - 38 = 608
608 ÷ 38 = 16
16 x 100 = 1600%
Example