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yourfriendfelix

Answer:

Both numerator and denominator can be divided by 3.

Explanation:

Find the HCF of 18 and 21.

Now, it's 3.

Answer:

3

Step-by-step explanation:

Both of them are in the table of 3 so 18/3 = 6 and 21/3 = 7

So the fraction will be = 6/7

That's your answer