Question

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Scott bought a large bag of cookies at the bakery. He ate 1/5 of a bag and his sister ate
2/7 of a bag.

What fraction of the bag did they eat?

What fraction of the bag remains?

Answer 1

Answer:

23/42

Step-by-step explanation:

2/7+ 1/6

Find common denominator which is 42

Multiply top and bottom of first fraction by 6 and Multiply top and bottom of second fraction by 7

New fractions are

12/42 + 7/42 = 19/42

Since the bag was 1 whole we need to make that 42/42

42/42 minus what they ate will tell fraction of the bag remains

42/42 - 19/42 = 23/42

Answer 2

Answer:

17/35, 18/35

Step-by-step explanation:

Find the common denominator to add those fractions together.

5 x 7 = 35 so the common denominator is 35. 1 x 7 is 7 so 1/5 is 7/35. 2 x 5 is 10 so 2/7 is 10/35.

10/35 + 7/35 = 17/35

They ate 17/35.

35/35 - 17/35 = 18/35

18/35 remains.