Question

express 4.7(bar on 7)in p/q form and find the value of p-q/p+q

Answer 1

Answer:

let X=4.7bar

X=4.777777_ _ _equation(1)

multiply eqn(1)with 10

10X=47.7777_ _ _eqn(2)

subtract eqn(2)-eqn(1)

9X=43

X=43/9

p=43,q=9 then,

p-q/p+q=17/26