Add 12/16 and 21/20
1st number: 12/16, 2nd number: 1 1/20
12/16 + 21/20 is 9/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 20 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 16 × 5 = 80,
12/16 = 12 × 5/16 × 5 = 60/80 - Likewise, for the 2nd fraction, since 20 × 4 = 80,
21/20 = 21 × 4/20 × 4 = 84/80 - Add the two like fractions:
60/80 + 84/80 = 60 + 84/80 = 144/80 - 144/80 simplified gives 9/5
- So, 12/16 + 21/20 = 9/5
In mixed form: 14/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/16+21/20 12/16+42/20 12/32+21/20 12/16+21/40 36/16+21/20 12/16+63/20 12/48+21/20 12/16+21/60 60/16+21/20 12/80+21/20 84/16+21/20