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Write the following proportion using colons. 7 is to 21 as 3 is to 9.
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Write the following proportion using colons. 7 is to 21 as 3 is to 9.

User Varma
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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
User Marisa
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