Add 3/15 and 90/70
1st number: 3/15, 2nd number: 1 20/70
3/15 + 90/70 is 52/35.
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,
90/70 = 90 × 3/70 × 3 = 270/210 - Add the two like fractions:
42/210 + 270/210 = 42 + 270/210 = 312/210 - 312/210 simplified gives 52/35
- So, 3/15 + 90/70 = 52/35
In mixed form: 117/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/15+90/70 3/30+90/70 9/15+90/70 3/45+90/70 3/75+90/70 21/15+90/70