Add 16/21 and 8/15
16/21 + 8/15 is 136/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 15 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
16/21 = 16 × 5/21 × 5 = 80/105 - Likewise, for the 2nd fraction, since 15 × 7 = 105,
8/15 = 8 × 7/15 × 7 = 56/105 - Add the two like fractions:
80/105 + 56/105 = 80 + 56/105 = 136/105 - So, 16/21 + 8/15 = 136/105
In mixed form: 131/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/21+8/15 16/21+16/15 16/42+8/15 16/21+8/30 48/21+8/15 16/21+24/15 16/63+8/15 16/21+8/45 80/21+8/15 16/21+40/15 16/21+8/75 16/21+56/15