0.45% is the change from 661 to 664
Calculation steps:
[( 664 - 661 ) ÷ 661] x 100 = 0.45%
Formula
Percentage change = [(664 - 661) / 661] x 100
Subtract the new number by the original number
664 - 661 = 3
3 ÷ 661 = 0.0045385779122541605
0.0045385779122541605 x 100 = 0.45%