Question

express 1.27 bar ,bar on 7
in the form of p/q​

Answer 1

Step-by-step explanation:

let 1.27 bar, bar on 7 =

x=1.2777- - - - - ➡️eq 1

periodicity is 1

so, multiply by using 10 on both sides .

10(x)=10(1.27777- - - -)

10x=12.777 _____________➡️ eq 2

now subtract 2 from 1

you will get 9x=11

x=11/9

therefore 1.27 bar =11/9

Answer 2

p/q form pf 1.27 bar, bar on 7 will be 23/18

Given,

1.27 bar, bar on 7

To Find,

We need to find p/q form of bar on 7 of 1.27 bar

Solution,

1.27 bar, bar on 7  

Let x = 1.277   be equation 1

10x =12.77 be equation 2

Here above we multiply both side by 10 because periodicity is 1.

Now we want to subtract equation 2 from equation 1

We will get 9x = 11.50

x=11.50 / 9

multiply both denominator and numerator with 10 will get

x= 115/90

Simplifying it we will get  23/18

Thus we get p/q = 23/18

p/q form pf 1.27 bar, bar on 7 will be 23/18