What is 5 2/3 - 7 1/2 in simplist form?

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First, convert  to an improper fraction. Use this rule:  =  / Your problem should look like:  - 
Second, simplify 5 × 3 to 15. / Your problem should look like:  - 
Third, simplify 15 + 2 to 17. / Your problem should look like:  - 
Fourth, convert  to an improper fraction. Use this rule:  =  / Your problem should look like:  - 
Fifth, simplify 7 × 2 to 14. / Your problem should look like:  - 
Sixth, simplify 14 + 1 to 15. / Your problem should look like:  - 
Seventh, find the least common denominator (LCD) 
3: 3, 6
2: 2, 4, 6
The LCD is 6.
Eighth, make the denominators the same. / Your problem should look like:  - 
Ninth, simplify. Your denominators should now be the same. / Your problem should look like:  - 
Tenth, join the denominators. / Your problem should look like: 
Eleventh, simplify. / Your problem should look like: 
Twelfth, convert to a mixed fraction. / Your problem should look like: 

Answer as fraction: 
Answer as decimal: -1.8333

What is the diagram u didn't post that