0.15% is the change from 664 to 665
Calculation steps:
[( 665 - 664 ) ÷ 664] x 100 = 0.15%
Formula
Percentage change = [(665 - 664) / 664] x 100
Subtract the new number by the original number
665 - 664 = 1
1 ÷ 664 = 0.0015060240963855422
0.0015060240963855422 x 100 = 0.15%