Add 7/15 and 21/56
7/15 + 21/56 is 101/120.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 56 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 15 × 56 = 840,
7/15 = 7 × 56/15 × 56 = 392/840 - Likewise, for the 2nd fraction, since 56 × 15 = 840,
21/56 = 21 × 15/56 × 15 = 315/840 - Add the two like fractions:
392/840 + 315/840 = 392 + 315/840 = 707/840 - 707/840 simplified gives 101/120
- So, 7/15 + 21/56 = 101/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/15+21/56 7/15+42/56 7/30+21/56 21/15+21/56 7/15+63/56 7/45+21/56 35/15+21/56 7/75+21/56 49/15+21/56