11/15 minus 3/10 = 13/30
3/10 - 11/15= 9/30 - 22/30 = -13/30
11/15 - 3/15 = 8/15
8/15 minus 7/20 is 11/60
Find the least common denominator of 10 and 15, which is 30. If 15 is doubled to 30, the 8 over it must be doubled to 16. If 10 is tripled to 30, the 9 over it must be tripled to 27. 27 over 30 minus 16 over 30 is 11 over 30.
11/15 − 3/10 = 13/30
11/15 minus 3/10 = 13/30
3/10 - 11/15= 9/30 - 22/30 = -13/30
11/15 - 3/15 = 8/15
7/15 − 1/10 = 11/30
Find the least common denominator of 10 and 15, which is 30. If 15 is doubled to 30, the 8 over it must be doubled to 16. If 10 is tripled to 30, the 9 over it must be tripled to 27. 27 over 30 minus 16 over 30 is 11 over 30.
8/15 minus 7/20 is 11/60
8/11 − 4/15 = 76/165
76/165
15.
2 over 15 3/5 x 3/3 = 9/15 11/15 - 9/15 = 2/15
10/15 - 3/15 = 7/15