Add 20/7 and 18/8
1st number: 2 6/7, 2nd number: 2 2/8
20/7 + 18/8 is 143/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 8 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 7 × 8 = 56,
20/7 = 20 × 8/7 × 8 = 160/56 - Likewise, for the 2nd fraction, since 8 × 7 = 56,
18/8 = 18 × 7/8 × 7 = 126/56 - Add the two like fractions:
160/56 + 126/56 = 160 + 126/56 = 286/56 - 286/56 simplified gives 143/28
- So, 20/7 + 18/8 = 143/28
In mixed form: 53/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/7+18/8 20/7+36/8 20/14+18/8 20/7+18/16 60/7+18/8 20/7+54/8 20/21+18/8 20/7+18/24 20/7+90/8 20/35+18/8 20/7+18/40 20/49+18/8 20/7+18/56