Subtract 25/7 from 42/27
1st number: 1 15/27, 2nd number: 3 4/7
42/27 - 25/7 is -127/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 7 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 7 × 27 = 189,
25/7 = 25 × 27/7 × 27 = 675/189 - Subtract the two like fractions:
294/189 - 675/189 = 294 - 675/189 = -381/189 - After reducing the fraction, the answer is -127/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/27-25/7 42/27-50/7 42/54-25/7 42/27-25/14 42/27-75/7 42/81-25/7 42/27-25/21 42/27-25/35 42/27-25/49