Subtract 28/21 from 18/14
1st number: 1 4/14, 2nd number: 1 7/21
18/14 - 28/21 is -1/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 14 × 3 = 42,
18/14 = 18 × 3/14 × 3 = 54/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
28/21 = 28 × 2/21 × 2 = 56/42 - Subtract the two like fractions:
54/42 - 56/42 = 54 - 56/42 = -2/42 - After reducing the fraction, the answer is -1/21
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