Add 6/15 and 21/16
1st number: 6/15, 2nd number: 1 5/16
6/15 + 21/16 is 137/80.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 16 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 15 × 16 = 240,
6/15 = 6 × 16/15 × 16 = 96/240 - Likewise, for the 2nd fraction, since 16 × 15 = 240,
21/16 = 21 × 15/16 × 15 = 315/240 - Add the two like fractions:
96/240 + 315/240 = 96 + 315/240 = 411/240 - 411/240 simplified gives 137/80
- So, 6/15 + 21/16 = 137/80
In mixed form: 157/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/15+21/16 6/15+42/16 6/30+21/16 6/15+21/32 18/15+21/16 6/15+63/16 6/45+21/16 6/15+21/48 30/15+21/16 6/75+21/16 6/15+21/80 42/15+21/16