Add 81/7 and 28/18
1st number: 11 4/7, 2nd number: 1 10/18
81/7 + 28/18 is 827/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 7 × 18 = 126,
81/7 = 81 × 18/7 × 18 = 1458/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
28/18 = 28 × 7/18 × 7 = 196/126 - Add the two like fractions:
1458/126 + 196/126 = 1458 + 196/126 = 1654/126 - 1654/126 simplified gives 827/63
- So, 81/7 + 28/18 = 827/63
In mixed form: 138/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/7+56/18 81/14+28/18 81/7+28/36 81/7+84/18 81/21+28/18 81/7+28/54 81/35+28/18 81/7+28/90 81/49+28/18