Subtract 27/10 from 21/2
1st number: 10 1/2, 2nd number: 2 7/10
21/2 - 27/10 is 39/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 10 is 10
Next, find the equivalent fraction of both fractional numbers with denominator 10 - For the 1st fraction, since 2 × 5 = 10,
21/2 = 21 × 5/2 × 5 = 105/10 - Likewise, for the 2nd fraction, since 10 × 1 = 10,
27/10 = 27 × 1/10 × 1 = 27/10 - Subtract the two like fractions:
105/10 - 27/10 = 105 - 27/10 = 78/10 - After reducing the fraction, the answer is 39/5
- In mixed form: 74/5
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