Subtract 12/28 from 10/30
10/30 - 12/28 is -2/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 28 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 30 × 14 = 420,
10/30 = 10 × 14/30 × 14 = 140/420 - Likewise, for the 2nd fraction, since 28 × 15 = 420,
12/28 = 12 × 15/28 × 15 = 180/420 - Subtract the two like fractions:
140/420 - 180/420 = 140 - 180/420 = -40/420 - After reducing the fraction, the answer is -2/21
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