isabelahrezdac isabelahrezdac
  • 14-10-2017
  • Mathematics
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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?

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ItzAquarius
ItzAquarius ItzAquarius
  • 14-10-2017
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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