Add 18/20 and 28/56
18/20 + 28/56 is 7/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 56 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 20 × 14 = 280,
18/20 = 18 × 14/20 × 14 = 252/280 - Likewise, for the 2nd fraction, since 56 × 5 = 280,
28/56 = 28 × 5/56 × 5 = 140/280 - Add the two like fractions:
252/280 + 140/280 = 252 + 140/280 = 392/280 - 392/280 simplified gives 7/5
- So, 18/20 + 28/56 = 7/5
In mixed form: 12/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/20+28/56 18/40+28/56 54/20+28/56 18/20+84/56 18/60+28/56 90/20+28/56