Subtract 15/21 from 21/10
1st number: 2 1/10, 2nd number: 15/21
21/10 - 15/21 is 97/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 10 × 21 = 210,
21/10 = 21 × 21/10 × 21 = 441/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
15/21 = 15 × 10/21 × 10 = 150/210 - Subtract the two like fractions:
441/210 - 150/210 = 441 - 150/210 = 291/210 - After reducing the fraction, the answer is 97/70
- In mixed form: 127/70
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