Subtract 15/18 from 18/7
1st number: 2 4/7, 2nd number: 15/18
18/7 - 15/18 is 73/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 7 × 18 = 126,
18/7 = 18 × 18/7 × 18 = 324/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
15/18 = 15 × 7/18 × 7 = 105/126 - Subtract the two like fractions:
324/126 - 105/126 = 324 - 105/126 = 219/126 - After reducing the fraction, the answer is 73/42
- In mixed form: 131/42
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