42.39% is the change from 644 to 917
Calculation steps:
[( 917 - 644 ) ÷ 644] x 100 = 42.39%
Formula
Percentage change = [(917 - 644) / 644] x 100
Subtract the new number by the original number
917 - 644 = 273
273 ÷ 644 = 0.42391304347826086
0.42391304347826086 x 100 = 42.39%