31.83% is the change from 644 to 849
Calculation steps:
[( 849 - 644 ) ÷ 644] x 100 = 31.83%
Formula
Percentage change = [(849 - 644) / 644] x 100
Subtract the new number by the original number
849 - 644 = 205
205 ÷ 644 = 0.31832298136645965
0.31832298136645965 x 100 = 31.83%