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There is a quick way to solve many of these questions.

A quick way to do this in your head, is to break down the result.

You want 35%

You have 15%

What is 35%? Two 15%(30) and 1/3rd of a 15%(5).

If you double the known number, you get the answer to the question of 30% of the number is 12 is 15% of it.

So, 12 + 12 is 30%

Now you are 5% off.

1/3rd of 15% is 5%

so 1/3rd of 12 is 4

Now you know that 30% of the number would be 24

and 5% of the number would be 4

Add the two and get your answer.

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13y ago
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Q: What is 35 percent of a number if12 is 15 percent of a number?
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