Question

Rewrite 4/21 and 2/9 so that they have a common denominator,

Answer 1

The common denominator between 21 and 9 is 63, the LCM OF them two numbers is 63
So…

12/63 and 14/63

Answer 2

Answer:

$\frac{12}{63} \: and \: \frac{14}{63}$

Step-by-step explanation:

The lowest common multiple between 21 and 9 is 63 as 21 = 21, 42, 63

9 = 9, 18, 27, 36, 45, 54, 63

therefore the common denominator is 63

$\frac{4}{21} = \frac{?}{63}$

21 × 3 = 63, so do the same to the numerator.

4 × 3 = 12 the numerator is 12

$\frac{4}{12} = \frac{12}{63}$

let's do the same to 2/9

$\frac{2}{9} = \frac{?}{63}$

9 × 7 = 63, so do the same to the numerator.

2 × 7 = 14

the numerator is 14

$\frac{2}{9} = \frac{14}{63}$