2.34% is the change from 641 to 656
Calculation steps:
[( 656 - 641 ) ÷ 641] x 100 = 2.34%
Formula
Percentage change = [(656 - 641) / 641] x 100
Subtract the new number by the original number
656 - 641 = 15
15 ÷ 641 = 0.0234009360374415
0.0234009360374415 x 100 = 2.34%