Add 21/20 and 80/56
1st number: 1 1/20, 2nd number: 1 24/56
21/20 + 80/56 is 347/140.
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,
21/20 = 21 × 14/20 × 14 = 294/280 - Likewise, for the 2nd fraction, since 56 × 5 = 280,
80/56 = 80 × 5/56 × 5 = 400/280 - Add the two like fractions:
294/280 + 400/280 = 294 + 400/280 = 694/280 - 694/280 simplified gives 347/140
- So, 21/20 + 80/56 = 347/140
In mixed form: 267/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/20+80/56 21/40+80/56 63/20+80/56 21/60+80/56