Add 21/16 and 9/18
1st number: 1 5/16, 2nd number: 9/18
21/16 + 9/18 is 29/16.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 18 is 144
Next, find the equivalent fraction of both fractional numbers with denominator 144 - For the 1st fraction, since 16 × 9 = 144,
21/16 = 21 × 9/16 × 9 = 189/144 - Likewise, for the 2nd fraction, since 18 × 8 = 144,
9/18 = 9 × 8/18 × 8 = 72/144 - Add the two like fractions:
189/144 + 72/144 = 189 + 72/144 = 261/144 - 261/144 simplified gives 29/16
- So, 21/16 + 9/18 = 29/16
In mixed form: 113/16
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/16+9/18 21/32+9/18 21/16+9/36 63/16+9/18 21/16+27/18 21/48+9/18 21/16+9/54 21/16+45/18 21/80+9/18 21/16+9/90 21/16+63/18