Add 18/15 and 21/48
1st number: 1 3/15, 2nd number: 21/48
18/15 + 21/48 is 131/80.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 48 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 15 × 16 = 240,
18/15 = 18 × 16/15 × 16 = 288/240 - Likewise, for the 2nd fraction, since 48 × 5 = 240,
21/48 = 21 × 5/48 × 5 = 105/240 - Add the two like fractions:
288/240 + 105/240 = 288 + 105/240 = 393/240 - 393/240 simplified gives 131/80
- So, 18/15 + 21/48 = 131/80
In mixed form: 151/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/15+21/48 18/15+42/48 18/30+21/48 18/15+21/96 54/15+21/48 18/15+63/48 18/45+21/48 90/15+21/48 18/75+21/48