6.27% is the change from 606 to 644
Calculation steps:
[( 644 - 606 ) ÷ 606] x 100 = 6.27%
Formula
Percentage change = [(644 - 606) / 606] x 100
Subtract the new number by the original number
644 - 606 = 38
38 ÷ 606 = 0.0627062706270627
0.0627062706270627 x 100 = 6.27%