Add 21/16 and 1/18
1st number: 1 5/16, 2nd number: 1/18
21/16 + 1/18 is 197/144.
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,
1/18 = 1 × 8/18 × 8 = 8/144 - Add the two like fractions:
189/144 + 8/144 = 189 + 8/144 = 197/144 - So, 21/16 + 1/18 = 197/144
In mixed form: 153/144
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/16+1/18 21/16+2/18 21/32+1/18 21/16+1/36 63/16+1/18 21/16+3/18 21/48+1/18 21/16+1/54 21/16+5/18 21/80+1/18 21/16+1/90 21/16+7/18