Add 1/42 and 81/70
1st number: 1/42, 2nd number: 1 11/70
1/42 + 81/70 is 124/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
1/42 = 1 × 5/42 × 5 = 5/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
81/70 = 81 × 3/70 × 3 = 243/210 - Add the two like fractions:
5/210 + 243/210 = 5 + 243/210 = 248/210 - 248/210 simplified gives 124/105
- So, 1/42 + 81/70 = 124/105
In mixed form: 119/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/42+81/70 1/84+81/70 3/42+81/70 5/42+81/70 7/42+81/70