34.32% is the change from 644 to 865
Calculation steps:
[( 865 - 644 ) ÷ 644] x 100 = 34.32%
Formula
Percentage change = [(865 - 644) / 644] x 100
Subtract the new number by the original number
865 - 644 = 221
221 ÷ 644 = 0.34316770186335405
0.34316770186335405 x 100 = 34.32%