Question

Express o.47 bar bar only on 7 as rational number

Answer 1

let x=0.47bar
multiply both sides by 10
10x= 4.7bar                                                      <equation 1>
multiply both sides <equation 1> by 10
100x=47.7bar                                                      <equation 2>
subtracting <equation 1> from <equation 2>.
90x=43
x=43/90
hence 0.47bar=43/90