4.7% is the change from 660 to 691
Calculation steps:
[( 691 - 660 ) ÷ 660] x 100 = 4.7%
Formula
Percentage change = [(691 - 660) / 660] x 100
Subtract the new number by the original number
691 - 660 = 31
31 ÷ 660 = 0.04696969696969697
0.04696969696969697 x 100 = 4.7%