0.15% is the change from 670 to 671
Calculation steps:
[( 671 - 670 ) ÷ 670] x 100 = 0.15%
Formula
Percentage change = [(671 - 670) / 670] x 100
Subtract the new number by the original number
671 - 670 = 1
1 ÷ 670 = 0.0014925373134328358
0.0014925373134328358 x 100 = 0.15%