29.68% is the change from 647 to 839
Calculation steps:
[( 839 - 647 ) ÷ 647] x 100 = 29.68%
Formula
Percentage change = [(839 - 647) / 647] x 100
Subtract the new number by the original number
839 - 647 = 192
192 ÷ 647 = 0.29675425038639874
0.29675425038639874 x 100 = 29.68%