3.46% is the change from 664 to 687
Calculation steps:
[( 687 - 664 ) ÷ 664] x 100 = 3.46%
Formula
Percentage change = [(687 - 664) / 664] x 100
Subtract the new number by the original number
687 - 664 = 23
23 ÷ 664 = 0.03463855421686747
0.03463855421686747 x 100 = 3.46%