21/30 - 8/30 = 13/30
3/10 - 11/15= 9/30 - 22/30 = -13/30
11/15 minus 3/10 = 13/30
13/30
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.
21/30 - 8/30 = 13/30
3/10 - 11/15= 9/30 - 22/30 = -13/30
11/15 minus 3/10 = 13/30
11/15 − 3/10 = 13/30
13/30
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.
7 and one third minus 3 and 9 tenths is six and 13 over 30 3 and 13/30
2 minus 5/6 = 11/6
21/30 - 5/30 = 16/30 = 8/15
1/3 − 3/10 = 1/30
9/10 − 1/3 = 17/30
Expressed as a proper fraction in its simplest form, 13/20 - 7/30 = 5/12 or five twelfths.