Subtract 15/18 from 21/14
1st number: 1 7/14, 2nd number: 15/18
21/14 - 15/18 is 2/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 14 × 9 = 126,
21/14 = 21 × 9/14 × 9 = 189/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
15/18 = 15 × 7/18 × 7 = 105/126 - Subtract the two like fractions:
189/126 - 105/126 = 189 - 105/126 = 84/126 - After reducing the fraction, the answer is 2/3
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