Add 35/28 and 40/20
1st number: 1 7/28, 2nd number: 2 0/20
35/28 + 40/20 is 13/4.
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,
40/20 = 40 × 7/20 × 7 = 280/140 - Add the two like fractions:
175/140 + 280/140 = 175 + 280/140 = 455/140 - 455/140 simplified gives 13/4
- So, 35/28 + 40/20 = 13/4
In mixed form: 31/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/28+40/20 35/28+80/20 35/56+40/20 35/84+40/20 35/28+40/60