Subtract 8/21 from 42/3
1st number: 14 0/3, 2nd number: 8/21
42/3 - 8/21 is 286/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 21 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 21 × 1 = 21,
8/21 = 8 × 1/21 × 1 = 8/21 - Subtract the two like fractions:
294/21 - 8/21 = 294 - 8/21 = 286/21 - In mixed form: 1313/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/3-8/21 42/3-16/21 42/6-8/21 42/3-8/42 42/3-24/21 42/9-8/21 42/3-8/63 42/3-40/21 42/15-8/21 42/3-56/21 42/21-8/21