Subtract 9/12 from 84/21
1st number: 4 0/21, 2nd number: 9/12
84/21 - 9/12 is 13/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 12 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
84/21 = 84 × 4/21 × 4 = 336/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
9/12 = 9 × 7/12 × 7 = 63/84 - Subtract the two like fractions:
336/84 - 63/84 = 336 - 63/84 = 273/84 - After reducing the fraction, the answer is 13/4
- In mixed form: 31/4
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