Add 10/20 and 42/70
10/20 + 42/70 is 11/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 70 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
10/20 = 10 × 7/20 × 7 = 70/140 - Likewise, for the 2nd fraction, since 70 × 2 = 140,
42/70 = 42 × 2/70 × 2 = 84/140 - Add the two like fractions:
70/140 + 84/140 = 70 + 84/140 = 154/140 - 154/140 simplified gives 11/10
- So, 10/20 + 42/70 = 11/10
In mixed form: 11/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/20+84/70 10/40+42/70 30/20+42/70 10/60+42/70 50/20+42/70 70/20+42/70