Add 21/20 and 5/16
1st number: 1 1/20, 2nd number: 5/16
21/20 + 5/16 is 109/80.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 16 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 20 × 4 = 80,
21/20 = 21 × 4/20 × 4 = 84/80 - Likewise, for the 2nd fraction, since 16 × 5 = 80,
5/16 = 5 × 5/16 × 5 = 25/80 - Add the two like fractions:
84/80 + 25/80 = 84 + 25/80 = 109/80 - So, 21/20 + 5/16 = 109/80
In mixed form: 129/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/20+5/16 21/20+10/16 21/40+5/16 21/20+5/32 63/20+5/16 21/20+15/16 21/60+5/16 21/20+5/48 21/20+25/16 21/20+5/80 21/20+35/16