Add 42/4 and 81/7
1st number: 10 2/4, 2nd number: 11 4/7
42/4 + 81/7 is 309/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 7 is 28
Next, find the equivalent fraction of both fractional numbers with denominator 28 - For the 1st fraction, since 4 × 7 = 28,
42/4 = 42 × 7/4 × 7 = 294/28 - Likewise, for the 2nd fraction, since 7 × 4 = 28,
81/7 = 81 × 4/7 × 4 = 324/28 - Add the two like fractions:
294/28 + 324/28 = 294 + 324/28 = 618/28 - 618/28 simplified gives 309/14
- So, 42/4 + 81/7 = 309/14
In mixed form: 221/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/4+81/7 42/8+81/7 42/4+81/14 42/12+81/7 42/4+81/21 42/20+81/7 42/4+81/35 42/28+81/7 42/4+81/49