First you need to find the common denominator.
18 6/15 - 7 4/5 = 18 6/15 - 7 12/15
Then change 18 6/15 to 17 21/15
17 21/15 - 7 12/15 = ?
Help
subtract 7 4/5 from 18 6/15
Can someone show me how to do this please
2 answers
http://www.aaastudy.com/fra66ex2.htm