Add 21/42 and 54/96
21/42 + 54/96 is 17/16.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 96 is 672
Next, find the equivalent fraction of both fractional numbers with denominator 672 - For the 1st fraction, since 42 × 16 = 672,
21/42 = 21 × 16/42 × 16 = 336/672 - Likewise, for the 2nd fraction, since 96 × 7 = 672,
54/96 = 54 × 7/96 × 7 = 378/672 - Add the two like fractions:
336/672 + 378/672 = 336 + 378/672 = 714/672 - 714/672 simplified gives 17/16
- So, 21/42 + 54/96 = 17/16
In mixed form: 11/16
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 21/84+54/96 63/42+54/96