Add 80/35 and 21/18
1st number: 2 10/35, 2nd number: 1 3/18
80/35 + 21/18 is 145/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 18 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 35 × 18 = 630,
80/35 = 80 × 18/35 × 18 = 1440/630 - Likewise, for the 2nd fraction, since 18 × 35 = 630,
21/18 = 21 × 35/18 × 35 = 735/630 - Add the two like fractions:
1440/630 + 735/630 = 1440 + 735/630 = 2175/630 - 2175/630 simplified gives 145/42
- So, 80/35 + 21/18 = 145/42
In mixed form: 319/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/35+42/18 80/70+21/18 80/35+21/36 80/35+63/18 80/35+21/54 80/35+21/90