Add 30/20 and 42/7
1st number: 1 10/20, 2nd number: 6 0/7
30/20 + 42/7 is 15/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 7 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 7 × 20 = 140,
42/7 = 42 × 20/7 × 20 = 840/140 - Add the two like fractions:
210/140 + 840/140 = 210 + 840/140 = 1050/140 - 1050/140 simplified gives 15/2
- So, 30/20 + 42/7 = 15/2
In mixed form: 71/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/20+42/7 30/20+84/7 30/40+42/7 30/20+42/14 90/20+42/7 30/60+42/7 30/20+42/21 30/20+42/35 30/20+42/49