Hannah sliced a pie into 12 equal pieces.Hannah and her brothers ate 3 of the 12 slices.

What fraction of the pie was NOT eaten?
A.1/3
B.1/4
C.2/3
D.3/4

We did this one together in class and my teacher said it was D
Explain?
I know its not B cause 3/12=1/4

12 - 3 = 9 pieces they didn't eat

9/12

Divide the numerator and the denominator by 3

9/12 = 3/4

Another way to figure it out is subtract 12/12 - 3/12 = 9/12 = 3/4

Thanks Ms. Sue!

You're welcome, Colton.

To find out what fraction of the pie was not eaten, we need to subtract the fraction of the pie that was eaten from the whole pie, which is represented by 12 equal slices.

We are given that Hannah and her brothers ate 3 out of the 12 slices, so the fraction of the pie that was eaten is 3/12.

To find the fraction of the pie that was not eaten, we can subtract 3/12 from 1 (which represents the whole pie).

1 - 3/12 = 12/12 - 3/12 = 9/12

So, the fraction of the pie that was not eaten is 9/12.

However, the question asks for the answer in simplest form. We can simplify the fraction by dividing both the numerator and denominator by their greatest common divisor, which is 3.

9/12 can be simplified as follows:
9 ÷ 3 = 3
12 ÷ 3 = 4

Therefore, 9/12 simplified is 3/4.

So, the correct answer is D.