0.6% is the change from 667 to 671
Calculation steps:
[( 671 - 667 ) ÷ 667] x 100 = 0.6%
Formula
Percentage change = [(671 - 667) / 667] x 100
Subtract the new number by the original number
671 - 667 = 4
4 ÷ 667 = 0.005997001499250375
0.005997001499250375 x 100 = 0.6%