Question

lois has 3 1/3 pounds of butter. she uses 3/4 pounds in a recipe. how much does she have left over?

Answer 1

First make 3 1/3 an improper fraction:

10/3

Then create common denominators between 10/3 and 3/4:

40/12 and 9/12

Now subtract the two:

40/12 - 9/12 = 31/12 or 2 7/12

Lois has 2 7/12 or 2.583 pounds of butter left.

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Answer 2

To find how much butter Lois has leftover, you need to subtract 3/4 from 3 1/3.

3 1/3-3/4=?

First, change 3 1/3 to a mixed number.

10/3-3/4=?

Find the LCM (Least Common Multiple) of 3 and 4. 3*4=12, so the LCM is 12. Adjust the fractions based on the new denominator of 12. Figure out how many times the old denominator can fit into the new denominator. Multiply the numerator by that number.

In example:

10/3=x/12. 3 can go into 12 4 times. 10*4=40.

40/12-9/12=?

40-9=31

31/12= 2 7/12

The answer is 2 7/12 pounds of butter.

Hope this helps :)