Add 2/30 and 80/21
1st number: 2/30, 2nd number: 3 17/21
2/30 + 80/21 is 407/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
2/30 = 2 × 7/30 × 7 = 14/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
80/21 = 80 × 10/21 × 10 = 800/210 - Add the two like fractions:
14/210 + 800/210 = 14 + 800/210 = 814/210 - 814/210 simplified gives 407/105
- So, 2/30 + 80/21 = 407/105
In mixed form: 392/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/30+80/21 2/60+80/21 2/30+80/42 6/30+80/21 2/90+80/21 2/30+80/63 10/30+80/21 14/30+80/21