This is how proportion is written 7:21=3:9. The colons are sign of division so it can be shown in the terms of fraction as 7/21=3/9 or 1/3=1/3

A. 7:21 = 3:9

Step-by-step explanation:

7 is to 21 as 3 is to 9.

You are watching: Write the following proportion using colons. 7 is to 21 as 3 is to 9.

Replace the word to with colons and the word as with the equals sign

7:21 = 3:9

A. 7:21 = 3:9

Step-by-step explanation:

7 is to 21 as 3 is to 9.

Replace the word to with colons and the word as with the equals sign

7:21 = 3:9

Option A.

Step-by-step explanation:

There are two fraction given in this question and we have to write the proportion using colon.

Visually fractions and are different but when we simplify these fractions we get the actual relation between them.

We simplify first.

By dividing from 7 in the numerator and denominator we get

similarly we simplify the fraction

By dividing numerator and denominator by 3

Now we can say that both the fractions are equal.

So the ratio will be 7 : 21 = 3 : 9

Option A. will be the answer.

Answer from: mmelody5

The answer is 7:21 = 3:9.

Answer from: laurenbreellamerritt

The answer is D. 7:21=3:9

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