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Mathematics 7 Online
OpenStudy (anonymous):

Divide http://prntscr.com/72k7yz

OpenStudy (♪chibiterasu):

We must create a common denominator.

OpenStudy (♪chibiterasu):

We have to multiply the numerator and the denominator of the second fraction by a number that will create a denominator of 10. 10/5 = 2 \[\frac {-4 \times 2}{-5 \times 2}\]

OpenStudy (anonymous):

8/10

OpenStudy (♪chibiterasu):

Hmm. Let's do this an easier way. Dividing a fraction is the same as multiplying by it's reciprocal. \[\frac{7}{10} \div \frac {4}{5} = \frac{7}{10} \times \frac{5}{4}\]

OpenStudy (♪chibiterasu):

So let's multiply the numerators and denominators. 7 * 5 = ? 10 * 4 = ?

OpenStudy (anonymous):

35 40

OpenStudy (♪chibiterasu):

Yes, so we have: \[\frac {35}{40}\]

OpenStudy (♪chibiterasu):

This can be simplified. Both of these numbers are divisible by 5. \[\frac {35 \div 5}{40 \div 5} = ?\]

OpenStudy (anonymous):

7 8

OpenStudy (♪chibiterasu):

Yeah.

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