3.6% is the change from 666 to 690
Calculation steps:
[( 690 - 666 ) ÷ 666] x 100 = 3.6%
Formula
Percentage change = [(690 - 666) / 666] x 100
Subtract the new number by the original number
690 - 666 = 24
24 ÷ 666 = 0.036036036036036036
0.036036036036036036 x 100 = 3.6%