Subtract 21/4 from 21/6
1st number: 3 3/6, 2nd number: 5 1/4
21/6 - 21/4 is -7/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 4 is 12
Next, find the equivalent fraction of both fractional numbers with denominator 12 - For the 1st fraction, since 6 × 2 = 12,
21/6 = 21 × 2/6 × 2 = 42/12 - Likewise, for the 2nd fraction, since 4 × 3 = 12,
21/4 = 21 × 3/4 × 3 = 63/12 - Subtract the two like fractions:
42/12 - 63/12 = 42 - 63/12 = -21/12 - After reducing the fraction, the answer is -7/4
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