31.52% is the change from 644 to 847
Calculation steps:
[( 847 - 644 ) ÷ 644] x 100 = 31.52%
Formula
Percentage change = [(847 - 644) / 644] x 100
Subtract the new number by the original number
847 - 644 = 203
203 ÷ 644 = 0.31521739130434784
0.31521739130434784 x 100 = 31.52%