Add 30/70 and 40/15
1st number: 30/70, 2nd number: 2 10/15
30/70 + 40/15 is 65/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 15 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 70 × 3 = 210,
30/70 = 30 × 3/70 × 3 = 90/210 - Likewise, for the 2nd fraction, since 15 × 14 = 210,
40/15 = 40 × 14/15 × 14 = 560/210 - Add the two like fractions:
90/210 + 560/210 = 90 + 560/210 = 650/210 - 650/210 simplified gives 65/21
- So, 30/70 + 40/15 = 65/21
In mixed form: 32/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/70+40/15 30/70+80/15 30/70+40/30 90/70+40/15 30/70+40/45 30/70+40/75