Gary is 8 3/4 years old. His brother is 3 7/12 years younger than he is. How many years old is Gary’s brother

Answer 1

To find out how old Gary's brother is, we need to subtract the age difference from Gary's age.

The age difference is 3 7/12 years.
To subtract this from Gary's age, we need to first convert both numbers to a common denominator (12):
3 7/12 = (3*12 + 7) / 12 = 43/12

Now we can perform the subtraction:
8 3/4 - 43/12 = (8*12 + 3) / 4 - 43/12
= (96 + 3) / 4 - 43/12
= 99/4 - 43/12

To subtract the fractions, we need to get a common denominator (12):
99/4 - 43/12 = (99*3) / (4*3) - 43/12
= 297/12 - 43/12
= (297 - 43) / 12
= 254/12
= 21 and 2/12
= 21 and 1/6

So Gary's brother is 21 and 1/6 years old.