Add 12/15 and 21/48
12/15 + 21/48 is 99/80.
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,
12/15 = 12 × 16/15 × 16 = 192/240 - Likewise, for the 2nd fraction, since 48 × 5 = 240,
21/48 = 21 × 5/48 × 5 = 105/240 - Add the two like fractions:
192/240 + 105/240 = 192 + 105/240 = 297/240 - 297/240 simplified gives 99/80
- So, 12/15 + 21/48 = 99/80
In mixed form: 119/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/15+21/48 12/15+42/48 12/30+21/48 12/15+21/96 36/15+21/48 12/15+63/48 12/45+21/48 60/15+21/48 12/75+21/48 84/15+21/48