Percent of an acre - Math Central

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Question from Christine, a parent:

Given that an acre is 43,560 sq/ft; If a piece of property is 19,506 sq/ft, What percentage of an acre is it?

Hi Christine.

A percentage is just a fraction which is some number (the percentage) over 100. So the question is really this: what number divided by 100 is the same as 19,506 over 43,560 ?

Algebraically, we'd say:

And using my calculator, 100 x 19,506 ÷ 43,560 = 44.78 (rounded off).

Cheers,
Stephen.

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