Add 28/30 and 7/20
28/30 + 7/20 is 77/60.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 30 × 2 = 60,
28/30 = 28 × 2/30 × 2 = 56/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
7/20 = 7 × 3/20 × 3 = 21/60 - Add the two like fractions:
56/60 + 21/60 = 56 + 21/60 = 77/60 - So, 28/30 + 7/20 = 77/60
In mixed form: 117/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/30+7/20 28/30+14/20 28/60+7/20 28/30+7/40 84/30+7/20 28/30+21/20 28/90+7/20 28/30+7/60 28/30+35/20 28/30+49/20