Add 15/28 and 42/8
1st number: 15/28, 2nd number: 5 2/8
15/28 + 42/8 is 81/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 8 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 28 × 2 = 56,
15/28 = 15 × 2/28 × 2 = 30/56 - Likewise, for the 2nd fraction, since 8 × 7 = 56,
42/8 = 42 × 7/8 × 7 = 294/56 - Add the two like fractions:
30/56 + 294/56 = 30 + 294/56 = 324/56 - 324/56 simplified gives 81/14
- So, 15/28 + 42/8 = 81/14
In mixed form: 511/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/28+42/8 15/28+84/8 15/56+42/8 15/28+42/16 45/28+42/8 15/84+42/8 15/28+42/24 75/28+42/8 15/28+42/40 15/28+42/56