Add 30/20 and 50/70
1st number: 1 10/20, 2nd number: 50/70
30/20 + 50/70 is 31/14.
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,
30/20 = 30 × 7/20 × 7 = 210/140 - Likewise, for the 2nd fraction, since 70 × 2 = 140,
50/70 = 50 × 2/70 × 2 = 100/140 - Add the two like fractions:
210/140 + 100/140 = 210 + 100/140 = 310/140 - 310/140 simplified gives 31/14
- So, 30/20 + 50/70 = 31/14
In mixed form: 23/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/20+50/70 30/40+50/70 90/20+50/70 30/60+50/70