49.53% is the change from 644 to 963
Calculation steps:
[( 963 - 644 ) ÷ 644] x 100 = 49.53%
Formula
Percentage change = [(963 - 644) / 644] x 100
Subtract the new number by the original number
963 - 644 = 319
319 ÷ 644 = 0.4953416149068323
0.4953416149068323 x 100 = 49.53%