Subtract 28/7 from 21/6
1st number: 3 3/6, 2nd number: 4 0/7
21/6 - 28/7 is -1/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 7 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 6 × 7 = 42,
21/6 = 21 × 7/6 × 7 = 147/42 - Likewise, for the 2nd fraction, since 7 × 6 = 42,
28/7 = 28 × 6/7 × 6 = 168/42 - Subtract the two like fractions:
147/42 - 168/42 = 147 - 168/42 = -21/42 - After reducing the fraction, the answer is -1/2
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