91 divided by 7 is 13.
13 is the missing number
1: 72
2: 32
3: 1/2
I think this is it
Answer:
20 hours
Step-by-step explanation:
Make the denominators equal for the 2 fractions by multiplying 3 by 10 to make 30. Do the same to the denominator, the answer being 20. So, the 2 fractions will now be 1/30 and 20/30. 1 fits into 20, 20 times.