One "subtracts" or "subtracts from." I'm not sure how to "subtract by." Whatever.
3/7 = 6/14
6/14 - 4/14 = 2/14 or 1/7
4/14 - 6/14 = -2/14 or -/1/7
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Twenty multiplied by 3/4 is 15.
Each of these factor pairs (multiply the numbers in parentheses) equal 15: (1, 15) (3, 5)
If that's 22 and 4/5 x 2/3, the answer is 228/15 = 76/5 or 15 and 1/5
The factor pairs of 135 are: 1 × 135 3 × 45 5 × 27 9 × 15
1, 3, 5, 15.