Add 15/28 and 9/42
15/28 + 9/42 is 3/4.
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,
9/42 = 9 × 2/42 × 2 = 18/84 - Add the two like fractions:
45/84 + 18/84 = 45 + 18/84 = 63/84 - 63/84 simplified gives 3/4
- So, 15/28 + 9/42 = 3/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/28+9/42 15/28+18/42 15/56+9/42 15/28+9/84 45/28+9/42 15/28+27/42 15/84+9/42 75/28+9/42 15/28+45/42 15/28+63/42