Add 1/20 and 30/28
1st number: 1/20, 2nd number: 1 2/28
1/20 + 30/28 is 157/140.
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,
1/20 = 1 × 7/20 × 7 = 7/140 - Likewise, for the 2nd fraction, since 28 × 5 = 140,
30/28 = 30 × 5/28 × 5 = 150/140 - Add the two like fractions:
7/140 + 150/140 = 7 + 150/140 = 157/140 - So, 1/20 + 30/28 = 157/140
In mixed form: 117/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/20+30/28 1/20+60/28 1/40+30/28 1/20+30/56 3/20+30/28 1/20+90/28 1/60+30/28 1/20+30/84 5/20+30/28 7/20+30/28