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Therefore

Thus in a fraction 7 / 11; numerator = 7 and denominator = 11

Converting mixed fractions into improper fractions.

Multiply the integral part by the denominator and to this product, add the numerator. The result so obtained is the numerator of the required fraction.

The denominator of the required fraction will be the same as the denominator of the given mixed fraction.

= (3 x 15 + 7) / 15

= 52 / 15.

Steps: -i) Find L.C.M.of the denominators of all the given fractions.

ii) Multiply numerator and denominators of each fraction by the same suitable number so that the denominator of each fraction becomes equal to the L.C.M. obtained in step (i).

Now, 3/7= (3x15)/ (7x15) =45/105

4/5= (4x21)/ (5x21) = 84/105