3 years ago

A city has 3 new houses for every 9 old houses. If there are 21 new houses in the city, how many old houses are there?

1 answer:

5 0

To find your answer you would divide 21 by 3 which would be 7, once you've got 7 you would multiply it by 9 which would give you the amount of old houses that there is which would be 63.

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