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Question
Carry out the following subtraction involving a rational number.
`7/11 - 3/7`
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Solution
`7/11 - 3/7`
Now, LCM of 11 and 7 is 77.
`7/11 - 3/7`
`= (7 xx 7)/(11 xx 7) - (3 xx 11)/(7 xx 11)`
`= 49/77 - 33/77`
`= (49 - 33)/77`
`= 16/77`
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Taking x = `(-4)/9`, y = `5/12` and z = `7/18`, find the rational number which when added to z gives us x.
