Subtract 81/21 from 75/14
1st number: 5 5/14, 2nd number: 3 18/21
75/14 - 81/21 is 3/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 14 × 3 = 42,
75/14 = 75 × 3/14 × 3 = 225/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
81/21 = 81 × 2/21 × 2 = 162/42 - Subtract the two like fractions:
225/42 - 162/42 = 225 - 162/42 = 63/42 - After reducing the fraction, the answer is 3/2
- In mixed form: 11/2
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