Subtract 28/56 from 3/30
3/30 - 28/56 is -2/5.
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,
3/30 = 3 × 28/30 × 28 = 84/840 - Likewise, for the 2nd fraction, since 56 × 15 = 840,
28/56 = 28 × 15/56 × 15 = 420/840 - Subtract the two like fractions:
84/840 - 420/840 = 84 - 420/840 = -336/840 - After reducing the fraction, the answer is -2/5
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