Add 30/14 and 70/15
1st number: 2 2/14, 2nd number: 4 10/15
30/14 + 70/15 is 143/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 15 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 14 × 15 = 210,
30/14 = 30 × 15/14 × 15 = 450/210 - Likewise, for the 2nd fraction, since 15 × 14 = 210,
70/15 = 70 × 14/15 × 14 = 980/210 - Add the two like fractions:
450/210 + 980/210 = 450 + 980/210 = 1430/210 - 1430/210 simplified gives 143/21
- So, 30/14 + 70/15 = 143/21
In mixed form: 617/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/14+70/15 30/28+70/15 30/14+70/30 90/14+70/15 30/42+70/15 30/14+70/45 30/70+70/15 30/14+70/75 30/98+70/15