Preston is making cookies. He has 4 over 5 cup of flour in a bag. He then used two 1 over 10 cups of flour for his recipe. Which of the following best explains the amount of flour left in the bag?

6 over 10, because 4 over 5 minus 2 times 1 over 10 equals 4 over 5 minus 3 over 10
5 over 10, because 4 over 5 minus 2 times 1 over 10 equals 4 over 5 minus 3 over 10
6 over 10, because 4 over 5 minus 2 times 1 over 10 equals 4 over 5 minus 2 over 10
5 over 10, because 4 over 5 minus 2 times 1 over 10 equals 4 over 5 minus 2 over 10

Question

Preston is making cookies. He has 4 over 5 cup of flour in a bag. He then used two  1 over 10 cups of flour for his recipe. Which of the following best explains the amount of flour left in the bag?

 6 over 10, because  4 over 5 minus 2 times 1 over 10 equals 4 over 5 minus 3 over 10
 5 over 10, because  4 over 5 minus 2 times 1 over 10 equals 4 over 5 minus 3 over 10
 6 over 10, because  4 over 5 minus 2 times 1 over 10 equals 4 over 5 minus 2 over 10
 5 over 10, because 4 over 5 minus 2 times 1 over 10 equals 4 over 5 minus 2 over 10