Add 15/20 and 42/14
1st number: 15/20, 2nd number: 3 0/14
15/20 + 42/14 is 15/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 14 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
15/20 = 15 × 7/20 × 7 = 105/140 - Likewise, for the 2nd fraction, since 14 × 10 = 140,
42/14 = 42 × 10/14 × 10 = 420/140 - Add the two like fractions:
105/140 + 420/140 = 105 + 420/140 = 525/140 - 525/140 simplified gives 15/4
- So, 15/20 + 42/14 = 15/4
In mixed form: 33/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/20+42/14 15/20+84/14 15/40+42/14 15/20+42/28 45/20+42/14 15/60+42/14 75/20+42/14 15/20+42/70 15/20+42/98