4 3/4 is equal to 19/4, while 5 2/5 is equal to 27/5. Now, we need to find a common denominator. Let's go with 20.
Multiply the top and bottom of the first equation by 5/5, and the second by 4/4. You get 95/20 and 108/20.
Find the difference. 108/20-95/20=13/20
You cannot simplify this fraction further because 13 is a prime number. Therefore, the tree grew 13/20 feet.
Hope that helped you!
