34.95% is the change from 638 to 861
Calculation steps:
[( 861 - 638 ) ÷ 638] x 100 = 34.95%
Formula
Percentage change = [(861 - 638) / 638] x 100
Subtract the new number by the original number
861 - 638 = 223
223 ÷ 638 = 0.3495297805642633
0.3495297805642633 x 100 = 34.95%