Add 10/42 and 81/7
1st number: 10/42, 2nd number: 11 4/7
10/42 + 81/7 is 248/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 7 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
10/42 = 10 × 1/42 × 1 = 10/42 - Likewise, for the 2nd fraction, since 7 × 6 = 42,
81/7 = 81 × 6/7 × 6 = 486/42 - Add the two like fractions:
10/42 + 486/42 = 10 + 486/42 = 496/42 - 496/42 simplified gives 248/21
- So, 10/42 + 81/7 = 248/21
In mixed form: 1117/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/42+81/7 10/84+81/7 10/42+81/14 30/42+81/7 10/42+81/21 50/42+81/7 10/42+81/35 70/42+81/7 10/42+81/49