Add 16/8 and 21/12
1st number: 2 0/8, 2nd number: 1 9/12
16/8 + 21/12 is 15/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 12 is 24
Next, find the equivalent fraction of both fractional numbers with denominator 24 - For the 1st fraction, since 8 × 3 = 24,
16/8 = 16 × 3/8 × 3 = 48/24 - Likewise, for the 2nd fraction, since 12 × 2 = 24,
21/12 = 21 × 2/12 × 2 = 42/24 - Add the two like fractions:
48/24 + 42/24 = 48 + 42/24 = 90/24 - 90/24 simplified gives 15/4
- So, 16/8 + 21/12 = 15/4
In mixed form: 33/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/8+21/12 16/8+42/12 16/8+21/24 48/8+21/12 16/8+63/12 16/24+21/12 16/8+21/36 80/8+21/12 16/40+21/12 16/8+21/60 16/56+21/12 16/8+21/84