Add 70/12 and 81/7
1st number: 5 10/12, 2nd number: 11 4/7
70/12 + 81/7 is 731/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 7 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
70/12 = 70 × 7/12 × 7 = 490/84 - Likewise, for the 2nd fraction, since 7 × 12 = 84,
81/7 = 81 × 12/7 × 12 = 972/84 - Add the two like fractions:
490/84 + 972/84 = 490 + 972/84 = 1462/84 - 1462/84 simplified gives 731/42
- So, 70/12 + 81/7 = 731/42
In mixed form: 1717/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/24+81/7 70/12+81/14 70/36+81/7 70/12+81/21 70/60+81/7 70/12+81/35 70/84+81/7 70/12+81/49