Abaker has 3/4 a pound of sugar 2/5 of a pound of cinnamon and 4/5 of a pound of flour. she uses 1/5 of a pound of each. how much sugar, cinnamon, and flour does she have left?

First, make all the denominators the same.

In this case, all the denominators are of the value of either 4 or 5. So, now what is the biggest number we can multiply by, using four AND five.

Answer is 20 because 5*4 is 20 and 4*5 is 20.

So now for all the ingredients, we have to :

-multiply the whole fraction by 4 if the denominator is 5

- Multiply the whole fraction by 5 if the denominator is 4

So for sugar, you would do 3/4 ( times 3 by 5, times 4 by 5)

Which is 15/20

For cinnamon, you would do 2/5 ( times 2 by 4, times 5 by 4)

Which is 8/20

For flour, you would do 4/5 ( times 4 by 4, times 5 by 4)

Which is 16/20

But, for your problem, you need to work out how much the baker has left over after using 1/5 of pound of all the ingredients. So, you would do 1/5 ( times 1 by 4, times 5 by 4)

Which is 4/20

Now, we can subtract it by the ingredients For sugar:

15/20 - 4/20

Now the baker has 11/20 pound of sugar

For cinnamon:

8/20 - 4/20

Now the baker has 4/20 pound of cinnamon ( simplified fraction is 1/5)

For flour

16/20 - 4/20

Now the baker has 12/20 pound of flour ( simplified fraction is 3/5)

Hope this helps;)

thanks

Explanation: