Subtract 4/15 from 42/21
1st number: 2 0/21, 2nd number: 4/15
42/21 - 4/15 is 26/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 15 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
42/21 = 42 × 5/21 × 5 = 210/105 - Likewise, for the 2nd fraction, since 15 × 7 = 105,
4/15 = 4 × 7/15 × 7 = 28/105 - Subtract the two like fractions:
210/105 - 28/105 = 210 - 28/105 = 182/105 - After reducing the fraction, the answer is 26/15
- In mixed form: 111/15
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