Add 3/15 and 40/70
3/15 + 40/70 is 27/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 15 × 14 = 210,
3/15 = 3 × 14/15 × 14 = 42/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
40/70 = 40 × 3/70 × 3 = 120/210 - Add the two like fractions:
42/210 + 120/210 = 42 + 120/210 = 162/210 - 162/210 simplified gives 27/35
- So, 3/15 + 40/70 = 27/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/15+40/70 3/15+80/70 3/30+40/70 9/15+40/70 3/45+40/70 3/75+40/70 21/15+40/70