5.18% is the change from 637 to 670
Calculation steps:
[( 670 - 637 ) ÷ 637] x 100 = 5.18%
Formula
Percentage change = [(670 - 637) / 637] x 100
Subtract the new number by the original number
670 - 637 = 33
33 ÷ 637 = 0.05180533751962323
0.05180533751962323 x 100 = 5.18%