Add 20/28 and 30/7
1st number: 20/28, 2nd number: 4 2/7
20/28 + 30/7 is 5/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 7 is 28
Next, find the equivalent fraction of both fractional numbers with denominator 28 - For the 1st fraction, since 28 × 1 = 28,
20/28 = 20 × 1/28 × 1 = 20/28 - Likewise, for the 2nd fraction, since 7 × 4 = 28,
30/7 = 30 × 4/7 × 4 = 120/28 - Add the two like fractions:
20/28 + 120/28 = 20 + 120/28 = 140/28 - 140/28 simplified gives 5/1
- So, 20/28 + 30/7 = 5/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/28+30/7 20/28+60/7 20/56+30/7 20/28+30/14 60/28+30/7 20/28+90/7 20/84+30/7 20/28+30/21 20/28+30/35 20/28+30/49