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katen-ka-za [31]
4 years ago
5

Subtract the fractions and simpilfy the answer 13/15 - 1/5

Mathematics
2 answers:
guajiro [1.7K]4 years ago
8 0
<span>13/15 - 1/5
=</span><span>13/15 - 3/15
=10/15
=2/3</span>
pychu [463]4 years ago
6 0
Equation: \frac{13}{15} - \frac{1}{5}

When adding or subtracting, you have to make sure they have a common denominator

So you have to multiply \frac{1}{5} by \frac{3}{3}

\frac{1}{5} * \frac{3}{3} = \frac{3}{15}

Since they both have the same denominator, you subtract

\frac{13}{15} - \frac{3}{15} = \frac{10}{15}

One thing to note is when subtracting, you DO NOT subtract the denominator, only the numerators

To reduce to the lowest terms, you need to find a common factor.
5 goes into 10 two times and goes into 15 three times

10 ÷ 5=2

15 ÷ 5=3

That leaves it with the fraction \frac{2}{3}

Answer: \frac{2}{3}
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3 - The standard deviation will be equal to the square root of the product of the proportion and its complementary, divided by the sample size.

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