Add 30/8 and 21/16
1st number: 3 6/8, 2nd number: 1 5/16
30/8 + 21/16 is 81/16.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 16 is 16
Next, find the equivalent fraction of both fractional numbers with denominator 16 - For the 1st fraction, since 8 × 2 = 16,
30/8 = 30 × 2/8 × 2 = 60/16 - Likewise, for the 2nd fraction, since 16 × 1 = 16,
21/16 = 21 × 1/16 × 1 = 21/16 - Add the two like fractions:
60/16 + 21/16 = 60 + 21/16 = 81/16 - So, 30/8 + 21/16 = 81/16
In mixed form: 51/16
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/8+21/16 30/8+42/16 30/16+21/16 30/8+21/32 90/8+21/16 30/8+63/16 30/24+21/16 30/8+21/48 30/40+21/16 30/8+21/80 30/56+21/16