-0.45% is the change from 667 to 664
Calculation steps:
[( 664 - 667 ) ÷ 667] x 100 = -0.45%
Formula
Percentage change = [(664 - 667) / 667] x 100
Subtract the new number by the original number
664 - 667 = -3
-3 ÷ 667 = -0.004497751124437781
-0.004497751124437781 x 100 = -0.45%