You can put this solution on YOUR website! FIRST YOU NEED TO FIND COMMON DENOMINATOR TO COMBINE (SUBTRACT) THESE TERMS.
THERE IS ALWAYS A SIMPLE, BUT ALWAYS A BETTER WAY, TO FIND A COMMON DENOMINATOR. HOEVER IN THIS CASE IT WORKS & IS THE LOWEST DENOMINATOR:
MULTIPLY THE TWO DENOMINATORS TOGETHER THUS:
11*6=66 WHICH HAVE COMMON FACTORS OF 11 & 6
(9*6-1*11)/66
(54-11)/66
43/66 OR .65 ANSWER.