Add 63/18 and 21/16
1st number: 3 9/18, 2nd number: 1 5/16
63/18 + 21/16 is 77/16.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 16 is 144
Next, find the equivalent fraction of both fractional numbers with denominator 144 - For the 1st fraction, since 18 × 8 = 144,
63/18 = 63 × 8/18 × 8 = 504/144 - Likewise, for the 2nd fraction, since 16 × 9 = 144,
21/16 = 21 × 9/16 × 9 = 189/144 - Add the two like fractions:
504/144 + 189/144 = 504 + 189/144 = 693/144 - 693/144 simplified gives 77/16
- So, 63/18 + 21/16 = 77/16
In mixed form: 413/16
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/18+42/16 63/36+21/16 63/18+21/32 63/18+63/16 63/54+21/16 63/18+21/48 63/90+21/16 63/18+21/80