Subtract 42/56 from 15/30
15/30 - 42/56 is -1/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 56 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 30 × 28 = 840,
15/30 = 15 × 28/30 × 28 = 420/840 - Likewise, for the 2nd fraction, since 56 × 15 = 840,
42/56 = 42 × 15/56 × 15 = 630/840 - Subtract the two like fractions:
420/840 - 630/840 = 420 - 630/840 = -210/840 - After reducing the fraction, the answer is -1/4
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