Add 3/20 and 18/28
3/20 + 18/28 is 111/140.
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,
3/20 = 3 × 7/20 × 7 = 21/140 - Likewise, for the 2nd fraction, since 28 × 5 = 140,
18/28 = 18 × 5/28 × 5 = 90/140 - Add the two like fractions:
21/140 + 90/140 = 21 + 90/140 = 111/140 - So, 3/20 + 18/28 = 111/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/20+18/28 3/20+36/28 3/40+18/28 3/20+18/56 9/20+18/28 3/20+54/28 3/60+18/28 3/20+18/84 15/20+18/28 3/20+90/28 21/20+18/28