Subtract 8/42 from 21/9
1st number: 2 3/9, 2nd number: 8/42
21/9 - 8/42 is 15/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 42 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 9 × 14 = 126,
21/9 = 21 × 14/9 × 14 = 294/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
8/42 = 8 × 3/42 × 3 = 24/126 - Subtract the two like fractions:
294/126 - 24/126 = 294 - 24/126 = 270/126 - After reducing the fraction, the answer is 15/7
- In mixed form: 21/7
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