Solving question 3)
The apple pie takes up 1/5 of the pan. If she eats 1/8 of the pan, that means that we need to fin how much 1/8 out of 1/5 is, and this will be the fraction of apple pie that Anna has eaten.
To find the, what we do is multiply both fractions:
Solving the multiplications (we multiply the numerators 1x1 and the denominators 8x5):
which results in:
Answer: Ana has eaten 1/40 of the apple pie