Subtract 42/15 from 4/10
1st number: 4/10, 2nd number: 2 12/15
4/10 - 42/15 is -12/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 15 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 10 × 3 = 30,
4/10 = 4 × 3/10 × 3 = 12/30 - Likewise, for the 2nd fraction, since 15 × 2 = 30,
42/15 = 42 × 2/15 × 2 = 84/30 - Subtract the two like fractions:
12/30 - 84/30 = 12 - 84/30 = -72/30 - After reducing the fraction, the answer is -12/5
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