Add 80/7 and 98/20
1st number: 11 3/7, 2nd number: 4 18/20
80/7 + 98/20 is 1143/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 7 × 20 = 140,
80/7 = 80 × 20/7 × 20 = 1600/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
98/20 = 98 × 7/20 × 7 = 686/140 - Add the two like fractions:
1600/140 + 686/140 = 1600 + 686/140 = 2286/140 - 2286/140 simplified gives 1143/70
- So, 80/7 + 98/20 = 1143/70
In mixed form: 1623/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/14+98/20 80/7+98/40 80/21+98/20 80/7+98/60 80/35+98/20 80/49+98/20