0.3% is the change from 664 to 666
Calculation steps:
[( 666 - 664 ) ÷ 664] x 100 = 0.3%
Formula
Percentage change = [(666 - 664) / 664] x 100
Subtract the new number by the original number
666 - 664 = 2
2 ÷ 664 = 0.0030120481927710845
0.0030120481927710845 x 100 = 0.3%