Subtract 12/7 from 42/3
1st number: 14 0/3, 2nd number: 1 5/7
42/3 - 12/7 is 86/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 7 is 21
Next, find the equivalent fraction of both fractional numbers with denominator 21 - For the 1st fraction, since 3 × 7 = 21,
42/3 = 42 × 7/3 × 7 = 294/21 - Likewise, for the 2nd fraction, since 7 × 3 = 21,
12/7 = 12 × 3/7 × 3 = 36/21 - Subtract the two like fractions:
294/21 - 36/21 = 294 - 36/21 = 258/21 - After reducing the fraction, the answer is 86/7
- In mixed form: 122/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/3-12/7 42/3-24/7 42/6-12/7 42/3-12/14 42/3-36/7 42/9-12/7 42/3-12/21 42/3-60/7 42/15-12/7 42/3-12/35 42/3-84/7 42/21-12/7 42/3-12/49