39.44% is the change from 644 to 898
Calculation steps:
[( 898 - 644 ) ÷ 644] x 100 = 39.44%
Formula
Percentage change = [(898 - 644) / 644] x 100
Subtract the new number by the original number
898 - 644 = 254
254 ÷ 644 = 0.3944099378881988
0.3944099378881988 x 100 = 39.44%