52.33% is the change from 644 to 981
Calculation steps:
[( 981 - 644 ) ÷ 644] x 100 = 52.33%
Formula
Percentage change = [(981 - 644) / 644] x 100
Subtract the new number by the original number
981 - 644 = 337
337 ÷ 644 = 0.5232919254658385
0.5232919254658385 x 100 = 52.33%