Add 3/70 and 42/20
1st number: 3/70, 2nd number: 2 2/20
3/70 + 42/20 is 15/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 70 × 2 = 140,
3/70 = 3 × 2/70 × 2 = 6/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
42/20 = 42 × 7/20 × 7 = 294/140 - Add the two like fractions:
6/140 + 294/140 = 6 + 294/140 = 300/140 - 300/140 simplified gives 15/7
- So, 3/70 + 42/20 = 15/7
In mixed form: 21/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/70+42/20 3/70+84/20 3/70+42/40 9/70+42/20 3/70+42/60 15/70+42/20 21/70+42/20