Question

express -4/7as a rational number with numerator 12 denominator 28​

Answer 1

Answer:-

-4/7

Now in order to make numerator 12, the denominator becomes -ve and 7 & -4 will be multiplied with -3.

-4/7 x -3/-3= 12/-21

In order to make denominator 28, multiply numerator and denominator by 4.

-4/7 x 4/4 = 16/28

Answer 2

Answer:

$\frac{( - 16)}{28}$

Solution :

Step 1: To get numerator 12,we must multiply (-4) by (-3) =

$\frac{ - 4}{7} = \frac{( - 4) \times ( - 3)}{7 \times ( - 3)} = \frac{12}{ - 21}$

Ans=

$\frac{12}{ - 21}$

Step2: To get denominator 28, we must multiply the given denominator 7 by 4

$\frac{( - 4) \times 4}{7 \times 4} = \frac{( - 16)}{28}$