Add 42/15 and 18/70
1st number: 2 12/15, 2nd number: 18/70
42/15 + 18/70 is 107/35.
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,
42/15 = 42 × 14/15 × 14 = 588/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
18/70 = 18 × 3/70 × 3 = 54/210 - Add the two like fractions:
588/210 + 54/210 = 588 + 54/210 = 642/210 - 642/210 simplified gives 107/35
- So, 42/15 + 18/70 = 107/35
In mixed form: 32/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/15+18/70 42/15+36/70 42/30+18/70 42/15+54/70 42/45+18/70 42/15+90/70 42/75+18/70