16050% is the change from 4 to 646
Calculation steps:
[( 646 - 4 ) ÷ 4] x 100 = 16050%
Formula
Percentage change = [(646 - 4) / 4] x 100
Subtract the new number by the original number
646 - 4 = 642
642 ÷ 4 = 160.5
160.5 x 100 = 16050%
Example