Because division by a number (the second fraction) is the same as multiplication by its reciprocal.
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Answer: -a/b is a fraction, its reciprocal is -b/a Why: Let's look at what reciprocal does. Take a fraction like 1/3 and its reciprocal is 3 . That is 1/ (1/3) and if we multiply the number by its reciprocal we get one. So now take -1/3. The question is whether the reciprocal is 3 or -3. If we multiply - 1/3 by 3 we have -1 and if we multiply it by -3 we have 1. The reciprocal of a positive or negative fraction is obtained by switching its numerator and denominator, the sign of the new fraction remains the same. So the answer is -3 and just as with positive fractions, we have the number multiplied by its reciprocal is 1
When you multiply a nonzero fraction by its reciprocal you get 1. Take this example.Lets say you have a fraction called (a/b). The reciprocal of that fraction would be (b/a). If you multiply the two you'd get (a/b)*(b/a)=(ab/ab). Anything divided by itself is 1.
The reciprocal of a number is simply 1 divided by that number. In this case, the number is 3 and 1/5. To find the reciprocal, you would first convert 3 and 1/5 to an improper fraction, which is 16/5. Then, you would take the reciprocal by dividing 1 by 16/5, which is equivalent to multiplying by the reciprocal of 16/5, giving you 5/16. Therefore, the reciprocal of 3 and 1/5 is 5/16.
You can search YouTube for "divide fractions", and find several.However, it isn't really that complicated; just remember the following simple rules:To divide one fraction by another fraction, take the reciprocal of the second fraction, then multiply.If you have mixed fractions, convert them both to improper fractions, then proceed as above (multiply by the reciprocal).
the first steps that you will have to take is gtegeagerge