Subtract 84/21 from 75/12
1st number: 6 3/12, 2nd number: 4 0/21
75/12 - 84/21 is 9/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
75/12 = 75 × 7/12 × 7 = 525/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
84/21 = 84 × 4/21 × 4 = 336/84 - Subtract the two like fractions:
525/84 - 336/84 = 525 - 336/84 = 189/84 - After reducing the fraction, the answer is 9/4
- In mixed form: 21/4
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