Step-by-step explanation:
To find the total amount of fudge left, you add the fractions together:
1/3 (plain fudge) + 7/12 (peanut butter fudge) + 2/3 (marshmallow fudge)
To add these fractions, you need to find a common denominator, which in this case is 12.
So, you convert 1/3 to 4/12 and 2/3 to 8/12.
Now, you add the fractions:
4/12 (plain fudge) + 7/12 (peanut butter fudge) + 8/12 (marshmallow fudge) = 19/12
Now, you can simplify 19/12:
19 ÷ 12 = 1 remainder 7
So, 19/12 is equal to 1 and 7/12.
Therefore, there is 1 and 7/12 slabs of fudge left in total.