Subtract 3/21 from 42/27
1st number: 1 15/27, 2nd number: 3/21
42/27 - 3/21 is 89/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 21 is 189
Next, find the equivalent fraction of both fractional numbers with denominator 189 - For the 1st fraction, since 27 × 7 = 189,
42/27 = 42 × 7/27 × 7 = 294/189 - Likewise, for the 2nd fraction, since 21 × 9 = 189,
3/21 = 3 × 9/21 × 9 = 27/189 - Subtract the two like fractions:
294/189 - 27/189 = 294 - 27/189 = 267/189 - After reducing the fraction, the answer is 89/63
- In mixed form: 126/63
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