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Question: adding unlike fractions

3/7 + 3/21

Sagot :

Prkinleinidn

Step-by-step explanation:

first, find a common denominator

3/7 = 9/21

3/21 stays the same.

then, add

9/21 + 3/21 = 12/21

and if possible, simplify

12 and 21 are both divisible by 3, so divide by 3.

12/3= 4, 21/3=7

so, 3/7 + 3/21 = 4/7

Aklee18ooidn

Answer:

4/7

Step-by-step explanation:

The fraction 3/21 can be simplified. The 3 divides 21 which 7, so the fraction can be written as 1 /7. Now, we just have:

3/7 + 1/7

We need to add the numerators to get one fraction:

4/7

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