No. Only if you want to get the correct answer.
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When dividing one fraction by another, invert the second fraction and multiply them.
You may be referring to the rule for dividing fractions. To divide one fraction by another, you invert the second fraction (exchange numerator and denominator), and multiply instead.
The process of dividing two fractions is to invert the second one and multiply. 3/4 divided by 5/6 = 3/4 x 6/5
Because that is just how it works mathematically If you divide one vulgar (or common) fraction by a second vulgar fraction, the rule is: Invert the second fraction and then multiply them together. It is too difficult to explain why this works, using typed explanation on the computer, but just accept that it works.
Multiply the first fraction by the reciprocal of the second. That is, flip the second fraction over and then multiply the two.