Add 21/15 and 6/16
1st number: 1 6/15, 2nd number: 6/16
21/15 + 6/16 is 71/40.
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,
21/15 = 21 × 16/15 × 16 = 336/240 - Likewise, for the 2nd fraction, since 16 × 15 = 240,
6/16 = 6 × 15/16 × 15 = 90/240 - Add the two like fractions:
336/240 + 90/240 = 336 + 90/240 = 426/240 - 426/240 simplified gives 71/40
- So, 21/15 + 6/16 = 71/40
In mixed form: 131/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/15+6/16 21/15+12/16 21/30+6/16 21/15+6/32 63/15+6/16 21/15+18/16 21/45+6/16 21/15+6/48 21/15+30/16 21/75+6/16 21/15+6/80 21/15+42/16