Question

15.712 bar , bar on one and two

Answer 1

Heya !!!

15.712 ( bar on 12)

Let X = 15.71212

Then X = 15.71212 -------(1)

Multiply equation (1) by 10 we get,

10X => 157.1212 -------(2)

Again multiply equation (2) by 100 we get

1000X = 15712.1212 ----(3)

Subtract equation (2) from equation (3) we get,

1000X = 15712.1212

10 = 157.1212

------------------

990X = 15555

X = 15555/990

Hence,

15.712 ( bar on 712) is in the form of 15555/990 which is in the form of P/Q

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Answer 2

Heya !!!

Here is Your Answer

Given :
15.7121212....

Let x = 15.71212....
Multiply by 10....
10x = 157.121212.... (i)
Multiply again till you get same repeating block of digits ...
100x = 1571.21212....
1000x = 15712.121212.... (ii)

Now, Subtract (I) from (II), we get.

$1000x \: = \: 15712.1212..... \\ . \: \: \: 10x \: = \: \: \: \: \: \: 157.1212..... \\ ........................................ \\ . \: 990x \: = \: \: 15555$

x = 15555/990

Hope It Helps