6.25% is the change from 608 to 646
Calculation steps:
[( 646 - 608 ) ÷ 608] x 100 = 6.25%
Formula
Percentage change = [(646 - 608) / 608] x 100
Subtract the new number by the original number
646 - 608 = 38
38 ÷ 608 = 0.0625
0.0625 x 100 = 6.25%
Example