Add 10/20 and 18/28
10/20 + 18/28 is 8/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 28 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
10/20 = 10 × 7/20 × 7 = 70/140 - Likewise, for the 2nd fraction, since 28 × 5 = 140,
18/28 = 18 × 5/28 × 5 = 90/140 - Add the two like fractions:
70/140 + 90/140 = 70 + 90/140 = 160/140 - 160/140 simplified gives 8/7
- So, 10/20 + 18/28 = 8/7
In mixed form: 11/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/20+36/28 10/40+18/28 10/20+18/56 30/20+18/28 10/20+54/28 10/60+18/28 10/20+18/84 50/20+18/28 10/20+90/28 70/20+18/28