Add 81/12 and 27/42
1st number: 6 9/12, 2nd number: 27/42
81/12 + 27/42 is 207/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 42 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
81/12 = 81 × 7/12 × 7 = 567/84 - Likewise, for the 2nd fraction, since 42 × 2 = 84,
27/42 = 27 × 2/42 × 2 = 54/84 - Add the two like fractions:
567/84 + 54/84 = 567 + 54/84 = 621/84 - 621/84 simplified gives 207/28
- So, 81/12 + 27/42 = 207/28
In mixed form: 711/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/12+54/42 81/24+27/42 81/12+27/84 81/12+81/42 81/36+27/42 81/60+27/42 81/84+27/42