Add 15/42 and 7/56
15/42 + 7/56 is 27/56.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 56 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 42 × 4 = 168,
15/42 = 15 × 4/42 × 4 = 60/168 - Likewise, for the 2nd fraction, since 56 × 3 = 168,
7/56 = 7 × 3/56 × 3 = 21/168 - Add the two like fractions:
60/168 + 21/168 = 60 + 21/168 = 81/168 - 81/168 simplified gives 27/56
- So, 15/42 + 7/56 = 27/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/42+7/56 15/42+14/56 15/84+7/56 45/42+7/56 15/42+21/56 75/42+7/56 15/42+35/56 15/42+49/56