Subtract 21/7 from 15/6
1st number: 2 3/6, 2nd number: 3 0/7
15/6 - 21/7 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,
15/6 = 15 × 7/6 × 7 = 105/42 - Likewise, for the 2nd fraction, since 7 × 6 = 42,
21/7 = 21 × 6/7 × 6 = 126/42 - Subtract the two like fractions:
105/42 - 126/42 = 105 - 126/42 = -21/42 - After reducing the fraction, the answer is -1/2
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