Add 80/7 and 20/40
1st number: 11 3/7, 2nd number: 20/40
80/7 + 20/40 is 167/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 7 × 40 = 280,
80/7 = 80 × 40/7 × 40 = 3200/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
20/40 = 20 × 7/40 × 7 = 140/280 - Add the two like fractions:
3200/280 + 140/280 = 3200 + 140/280 = 3340/280 - 3340/280 simplified gives 167/14
- So, 80/7 + 20/40 = 167/14
In mixed form: 1113/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/14+20/40 80/7+20/80 80/7+60/40 80/21+20/40 80/35+20/40 80/49+20/40