Add 18/8 and 81/28
1st number: 2 2/8, 2nd number: 2 25/28
18/8 + 81/28 is 36/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 28 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 8 × 7 = 56,
18/8 = 18 × 7/8 × 7 = 126/56 - Likewise, for the 2nd fraction, since 28 × 2 = 56,
81/28 = 81 × 2/28 × 2 = 162/56 - Add the two like fractions:
126/56 + 162/56 = 126 + 162/56 = 288/56 - 288/56 simplified gives 36/7
- So, 18/8 + 81/28 = 36/7
In mixed form: 51/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/8+81/28 18/16+81/28 18/8+81/56 54/8+81/28 18/24+81/28 18/8+81/84 90/8+81/28 18/40+81/28 18/56+81/28