Add 15/16 and 21/56
15/16 + 21/56 is 21/16.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 56 is 112
Next, find the equivalent fraction of both fractional numbers with denominator 112 - For the 1st fraction, since 16 × 7 = 112,
15/16 = 15 × 7/16 × 7 = 105/112 - Likewise, for the 2nd fraction, since 56 × 2 = 112,
21/56 = 21 × 2/56 × 2 = 42/112 - Add the two like fractions:
105/112 + 42/112 = 105 + 42/112 = 147/112 - 147/112 simplified gives 21/16
- So, 15/16 + 21/56 = 21/16
In mixed form: 15/16
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/16+21/56 15/16+42/56 15/32+21/56 45/16+21/56 15/16+63/56 15/48+21/56 75/16+21/56 15/80+21/56