Add 42/84 and 15/7
1st number: 42/84, 2nd number: 2 1/7
42/84 + 15/7 is 37/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 7 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 84 × 1 = 84,
42/84 = 42 × 1/84 × 1 = 42/84 - Likewise, for the 2nd fraction, since 7 × 12 = 84,
15/7 = 15 × 12/7 × 12 = 180/84 - Add the two like fractions:
42/84 + 180/84 = 42 + 180/84 = 222/84 - 222/84 simplified gives 37/14
- So, 42/84 + 15/7 = 37/14
In mixed form: 29/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/84+30/7 42/84+15/14 42/84+45/7 42/84+15/21 42/84+75/7 42/84+15/35 42/84+15/49