Add 30/28 and 15/20
1st number: 1 2/28, 2nd number: 15/20
30/28 + 15/20 is 51/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 28 × 5 = 140,
30/28 = 30 × 5/28 × 5 = 150/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
15/20 = 15 × 7/20 × 7 = 105/140 - Add the two like fractions:
150/140 + 105/140 = 150 + 105/140 = 255/140 - 255/140 simplified gives 51/28
- So, 30/28 + 15/20 = 51/28
In mixed form: 123/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/28+15/20 30/28+30/20 30/56+15/20 30/28+15/40 90/28+15/20 30/28+45/20 30/84+15/20 30/28+15/60 30/28+75/20