6.35% is the change from 646 to 687
Calculation steps:
[( 687 - 646 ) ÷ 646] x 100 = 6.35%
Formula
Percentage change = [(687 - 646) / 646] x 100
Subtract the new number by the original number
687 - 646 = 41
41 ÷ 646 = 0.06346749226006192
0.06346749226006192 x 100 = 6.35%