• Given the fraction 5 out of 7, you can write it as:
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:
• Given the fraction 30 out of 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:
Hence, the answers are:
• Multiply its part and whole by:
• Divide its part and whole by:
