Subtract 21/3 from 9/4
1st number: 2 1/4, 2nd number: 7 0/3
9/4 - 21/3 is -19/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 3 is 12
Next, find the equivalent fraction of both fractional numbers with denominator 12 - For the 1st fraction, since 4 × 3 = 12,
9/4 = 9 × 3/4 × 3 = 27/12 - Likewise, for the 2nd fraction, since 3 × 4 = 12,
21/3 = 21 × 4/3 × 4 = 84/12 - Subtract the two like fractions:
27/12 - 84/12 = 27 - 84/12 = -57/12 - After reducing the fraction, the answer is -19/4
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