Add 42/56 and 15/7
1st number: 42/56, 2nd number: 2 1/7
42/56 + 15/7 is 81/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 7 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 56 × 1 = 56,
42/56 = 42 × 1/56 × 1 = 42/56 - Likewise, for the 2nd fraction, since 7 × 8 = 56,
15/7 = 15 × 8/7 × 8 = 120/56 - Add the two like fractions:
42/56 + 120/56 = 42 + 120/56 = 162/56 - 162/56 simplified gives 81/28
- So, 42/56 + 15/7 = 81/28
In mixed form: 225/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/56+15/7 42/56+30/7 42/56+15/14 42/56+45/7 42/56+15/21 42/56+75/7 42/56+15/35 42/56+15/49