Add 42/14 and 15/21
1st number: 3 0/14, 2nd number: 15/21
42/14 + 15/21 is 26/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 14 × 3 = 42,
42/14 = 42 × 3/14 × 3 = 126/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
15/21 = 15 × 2/21 × 2 = 30/42 - Add the two like fractions:
126/42 + 30/42 = 126 + 30/42 = 156/42 - 156/42 simplified gives 26/7
- So, 42/14 + 15/21 = 26/7
In mixed form: 35/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/14+15/21 42/14+30/21 42/28+15/21 42/14+15/42 42/14+45/21 42/14+15/63 42/14+75/21 42/70+15/21 42/98+15/21