Subtract 42/9 from 81/3
1st number: 27 0/3, 2nd number: 4 6/9
81/3 - 42/9 is 67/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 9 is 9
Next, find the equivalent fraction of both fractional numbers with denominator 9 - For the 1st fraction, since 3 × 3 = 9,
81/3 = 81 × 3/3 × 3 = 243/9 - Likewise, for the 2nd fraction, since 9 × 1 = 9,
42/9 = 42 × 1/9 × 1 = 42/9 - Subtract the two like fractions:
243/9 - 42/9 = 243 - 42/9 = 201/9 - After reducing the fraction, the answer is 67/3
- In mixed form: 221/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/3-84/9 81/6-42/9 81/3-42/18 81/9-42/9 81/3-42/27 81/15-42/9 81/3-42/45 81/21-42/9 81/3-42/63