Subtract 3/10 from 42/15
1st number: 2 12/15, 2nd number: 3/10
42/15 - 3/10 is 5/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 10 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 15 × 2 = 30,
42/15 = 42 × 2/15 × 2 = 84/30 - Likewise, for the 2nd fraction, since 10 × 3 = 30,
3/10 = 3 × 3/10 × 3 = 9/30 - Subtract the two like fractions:
84/30 - 9/30 = 84 - 9/30 = 75/30 - After reducing the fraction, the answer is 5/2
- In mixed form: 21/2
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