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Please help I think I understand it but need to make sure

Please help I think I understand it but need to make sure-example-1

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• Given the fraction 5 out of 7, you can write it as:


(5)/(7)

Where 5 is the part and 7 is the whole.

Notice that, in order to obtain 15 out of 21, you need to multiply the numerator and the denominator by 3:


=(5\cdot3)/(7\cdot3)=(15)/(21)

• Given the fraction 30 out of 50:


(30)/(50)

You need to divide the numerator and the denominator by the same number, in order to reduce it. If you divided them by 5, you get:


=(30/5)/(50/5)=(6)/(10)

Hence, the answers are:

• Multiply its part and whole by:


3

• Divide its part and whole by:


5

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