Add 7/28 and 10/20
7/28 + 10/20 is 3/4.
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,
7/28 = 7 × 5/28 × 5 = 35/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
10/20 = 10 × 7/20 × 7 = 70/140 - Add the two like fractions:
35/140 + 70/140 = 35 + 70/140 = 105/140 - 105/140 simplified gives 3/4
- So, 7/28 + 10/20 = 3/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/28+10/20 7/56+10/20 7/28+10/40 21/28+10/20 7/28+30/20 7/84+10/20 7/28+10/60 35/28+10/20 7/28+50/20 49/28+10/20 7/28+70/20