Add 15/28 and 36/42
15/28 + 36/42 is 39/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 42 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 28 × 3 = 84,
15/28 = 15 × 3/28 × 3 = 45/84 - Likewise, for the 2nd fraction, since 42 × 2 = 84,
36/42 = 36 × 2/42 × 2 = 72/84 - Add the two like fractions:
45/84 + 72/84 = 45 + 72/84 = 117/84 - 117/84 simplified gives 39/28
- So, 15/28 + 36/42 = 39/28
In mixed form: 111/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/28+36/42 15/28+72/42 15/56+36/42 15/28+36/84 45/28+36/42 15/84+36/42 75/28+36/42