ineed help with this: 3/8-5/6

Question

i'm 64 and trying to help my granddaughter with this problem: 3/8 - 5/6

Answer 1

3/8-5/6

find the least common denominator

8=2*2*2

6=2*3

LCD=2*2*2*3=24

3/8=?/24

3/8=3*3/8*3=9/24

5/6=?/24

5*4/6*4=20/24

9/24-20/24=(9-20)/24=-11/24

Answer 2

Use least common denominator of 24.

9/24 - 20/24 is -11/24

hope this helps