Add 10/70 and 10/15
10/70 + 10/15 is 17/21.
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,
10/70 = 10 × 3/70 × 3 = 30/210 - Likewise, for the 2nd fraction, since 15 × 14 = 210,
10/15 = 10 × 14/15 × 14 = 140/210 - Add the two like fractions:
30/210 + 140/210 = 30 + 140/210 = 170/210 - 170/210 simplified gives 17/21
- So, 10/70 + 10/15 = 17/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/70+10/15 10/70+20/15 10/70+10/30 30/70+10/15 10/70+30/15 10/70+10/45 50/70+10/15 10/70+50/15 10/70+10/75 10/70+70/15