9/10 - 13/30 = 27/30 - 13/30 = 14/30 = 7/15
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∙ 11y ago21/30 - 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 − 3/10 = 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.
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
9/10 − 1/3 = 17/30
1/3 − 3/10 = 1/30
13 over 40 explanation: you must multiply 7 over 10 by 8 and 3over 8 by 10 so the denominators are the same. you end up with 56 over 80 minus 30 over 80. Your answer, 26 over 80 and you must simplify, so divide both top and bottom by two and you have you answer.