49.38% is the change from 644 to 962
Calculation steps:
[( 962 - 644 ) ÷ 644] x 100 = 49.38%
Formula
Percentage change = [(962 - 644) / 644] x 100
Subtract the new number by the original number
962 - 644 = 318
318 ÷ 644 = 0.4937888198757764
0.4937888198757764 x 100 = 49.38%