31.73% is the change from 643 to 847
Calculation steps:
[( 847 - 643 ) ÷ 643] x 100 = 31.73%
Formula
Percentage change = [(847 - 643) / 643] x 100
Subtract the new number by the original number
847 - 643 = 204
204 ÷ 643 = 0.31726283048211507
0.31726283048211507 x 100 = 31.73%