Subtract 21/4 from 90/12
1st number: 7 6/12, 2nd number: 5 1/4
90/12 - 21/4 is 9/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 4 is 12
Next, find the equivalent fraction of both fractional numbers with denominator 12 - For the 1st fraction, since 12 × 1 = 12,
90/12 = 90 × 1/12 × 1 = 90/12 - Likewise, for the 2nd fraction, since 4 × 3 = 12,
21/4 = 21 × 3/4 × 3 = 63/12 - Subtract the two like fractions:
90/12 - 63/12 = 90 - 63/12 = 27/12 - After reducing the fraction, the answer is 9/4
- In mixed form: 21/4
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