0.61% is the change from 661 to 665
Calculation steps:
[( 665 - 661 ) ÷ 661] x 100 = 0.61%
Formula
Percentage change = [(665 - 661) / 661] x 100
Subtract the new number by the original number
665 - 661 = 4
4 ÷ 661 = 0.006051437216338881
0.006051437216338881 x 100 = 0.61%