# How do you multiply fractions with whole numbers?(ex.3 3/4 times 3 3/4)

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asked Mar 1, 2016 in Math
edited Mar 2, 2016
commented Nov 10, 2018 by The White Tigris

First turn the whole number into a fraction by putting a zero under it

Then multiply the tops with the tops and the bottom number with the bottom number

answered Mar 4, 2016 by (22,350 points)

You need to first convert everything to a simple fraction, like 4/7, 3/5, etc.

After that just multiply the tops and bottoms separately.

Example:

3 3/4 x 3 3/4

Convert 3 3/4 to a simple fraction first

3 3/4 = 3 + 3/4 (same thing. think about measuring water in a cup. you would add 3 cups PLUS 3/4 of a cup). In order to add the fractions, you need to make them both have the same bottom part, so multiply the 3, which is really 3/1 too, by 4 on the top and bottom

3/1 = 4x3/4x1 = 12/4

12/4 + 3/4 = 15/4

A shortcut to doing this conversion is to just multiply the bottom number of the mixed fraction '4' in 3 3/4 by the whole number on the far left ('3') and add it to the top part of the fraction. 4x3 + 3  = 15. You then put it all over the bottom part, so 15/4.

Once you have 2 regular fractions, just add them up.

15/4 + 15/4 = 30/4 = 7 1/2
answered Jun 27, 2017 by (424,120 points)
change into improper fraction

ex. 15/4 times 15/4

15*15/4*4

=225/16

=14.0625