Subtract 21/42 from 21/10
1st number: 2 1/10, 2nd number: 21/42
21/10 - 21/42 is 8/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 42 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 42 × 5 = 210,
21/42 = 21 × 5/42 × 5 = 105/210 - Subtract the two like fractions:
441/210 - 105/210 = 441 - 105/210 = 336/210 - After reducing the fraction, the answer is 8/5
- In mixed form: 13/5
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