# 15 is 25% of what number?

Write an expression when doing percentage questions to help clarify what's being asked for and you'll get to

We're asked to figure out what number it is that if we take 25% of it we get 15 (remember that 25% can be written as a decimal of .25):

Let's solve for x:

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[ 15 = 0.25 \times N ]

[ N = \frac{15}{0.25} ]

[ N = 60 ]

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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