Add 21/18 and 63/16
1st number: 1 3/18, 2nd number: 3 15/16
21/18 + 63/16 is 245/48.
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,
21/18 = 21 × 8/18 × 8 = 168/144 - Likewise, for the 2nd fraction, since 16 × 9 = 144,
63/16 = 63 × 9/16 × 9 = 567/144 - Add the two like fractions:
168/144 + 567/144 = 168 + 567/144 = 735/144 - 735/144 simplified gives 245/48
- So, 21/18 + 63/16 = 245/48
In mixed form: 55/48
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/18+63/16 21/36+63/16 21/18+63/32 63/18+63/16 21/54+63/16 21/18+63/48 21/90+63/16 21/18+63/80