Subtract 30/14 from 28/21
1st number: 1 7/21, 2nd number: 2 2/14
28/21 - 30/14 is -17/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 14 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
28/21 = 28 × 2/21 × 2 = 56/42 - Likewise, for the 2nd fraction, since 14 × 3 = 42,
30/14 = 30 × 3/14 × 3 = 90/42 - Subtract the two like fractions:
56/42 - 90/42 = 56 - 90/42 = -34/42 - After reducing the fraction, the answer is -17/21
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