Answer: 14) 1.5, 15) 5/8, 16) 1/6
Explanation:
For the first one, you want to find the least common denominator. The least common denominator is 10, so you multiply the numerator and denominator to get 9/10+6/10=15/10. 15/10 is 1.5 or 1 1/2
for the 2nd one you do the same thing. You can get 1/4 to have a denominator of 8 by converting it to 2/8. 7/8-2/8=5/8
finally, you can change 2/3 to 4/6 to get a common denominator. 5/6-4/6=1/6.