6.18% is the change from 631 to 670
Calculation steps:
[( 670 - 631 ) ÷ 631] x 100 = 6.18%
Formula
Percentage change = [(670 - 631) / 631] x 100
Subtract the new number by the original number
670 - 631 = 39
39 ÷ 631 = 0.061806656101426306
0.061806656101426306 x 100 = 6.18%