Add 35/28 and 15/20
1st number: 1 7/28, 2nd number: 15/20
35/28 + 15/20 is 2/1.
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,
35/28 = 35 × 5/28 × 5 = 175/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
15/20 = 15 × 7/20 × 7 = 105/140 - Add the two like fractions:
175/140 + 105/140 = 175 + 105/140 = 280/140 - 280/140 simplified gives 2/1
- So, 35/28 + 15/20 = 2/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/28+15/20 35/28+30/20 35/56+15/20 35/28+15/40 35/28+45/20 35/84+15/20 35/28+15/60 35/28+75/20