###### Asked in Math and ArithmeticAlgebraPercentages, Fractions, and Decimal Values

Math and Arithmetic

Algebra

Percentages, Fractions, and Decimal Values

# What is the formula for multipling fractions?

## Answer

###### Wiki User

###### September 04, 2007 1:15AM

When dividing fractions, multiply by the *inverse* of the
fraction.

That is, *a*/*b* divided by *x*/*y* =
*a*/*b* times *y*/*x* = *ay*/*bx*

For example,

2/5 divided by 3 = 2/5 x 1/3 = 2/15

2/5 divided by 1/3 = 2/5 x 3/1 = 6/5

5 divided by 3 = 5/1 x 1/3 = 5/3

5 divided by 1/3 = 5/1 x 3/1 = 15/1 (= 15)

## Related Questions

###### Asked in Chemistry

### Can subscripts in a chemical formula be fractions?

The Subscripts in a Chemical formula explain how the atoms in
that compound are chemically bonded. As a fraction of an atom
cannot bond, the subscripts cannot be fractions. Coefficients,
however which go before a chemical formula in chemical equations
may be fractions. This is because they explain the ratio of the
number of moles of each species required for the reaction and it is
possible to have a fraction of a mole of something. The Subscripts
in a Chemical formula explain how the atoms in that compound are
chemically bonded. As a fraction of an atom cannot bond, the
subscripts cannot be fractions. Coefficients, however which go
before a chemical formula in chemical equations may be fractions.
This is because they explain the ratio of the number of moles of
each species required for the reaction and it is possible to have a
fraction of a mole of something.

###### Asked in Percentages, Fractions, and Decimal Values

### What is the formula in dividing fractions?

There is no formula for dividing fractions, but there is a way
of doing it. When you a fraction divided by another fraction like
below... 1/2 divided by 4/7.... Swap the second fraction around and
then multiply like this... 1/2 multiplied by 7/4.... And when
multiplying fractions, multiply the numerators (top number)
together, and the denominators (bottom number) together (1x7)/(2x4)
= 7/8 Simple