Subtract 21/42 from 49/18
1st number: 2 13/18, 2nd number: 21/42
49/18 - 21/42 is 20/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 42 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
49/18 = 49 × 7/18 × 7 = 343/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
21/42 = 21 × 3/42 × 3 = 63/126 - Subtract the two like fractions:
343/126 - 63/126 = 343 - 63/126 = 280/126 - After reducing the fraction, the answer is 20/9
- In mixed form: 22/9
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