Subtract 7/21 from 7/2
1st number: 3 1/2, 2nd number: 7/21
72 - 721 is 196.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 2 × 21 = 42,
72 = 7 × 212 × 21 = 14742 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
721 = 7 × 221 × 2 = 1442 - Subtract the two like fractions:
14742 - 1442 = 147 - 1442 = 13342 - After reducing the fraction, the answer is 196
- In mixed form: 316
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