Subtract 21/84 from 90/12
1st number: 7 6/12, 2nd number: 21/84
90/12 - 21/84 is 29/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 84 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
90/12 = 90 × 7/12 × 7 = 630/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
21/84 = 21 × 1/84 × 1 = 21/84 - Subtract the two like fractions:
630/84 - 21/84 = 630 - 21/84 = 609/84 - After reducing the fraction, the answer is 29/4
- In mixed form: 71/4
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