Answer:
5/12 of cookies left on the plate
Step-by-step explanation:
we have to add to know what part of the dish ate and then subtract it from the total
1/12 + 4/12 + 2/12 =
when we are adding fractions with the same denominator we simply add the above
1 + 4 + 2 = 7
1/12 + 4/12 + 2/12 = 7/12
now to the total of the plate that would be 1 we subtract what they ate
1 - 7/12 =
the whole 1 can be expressed as 12/12 since if we do the 12/12 = 1 account
12/12 - 7/12
for the subtraction with the same denominator the same thing happens as for the sum, we only do it with the top
12 - 7 = 5
12/12 - 7/12 = 5/12
