Add 54/84 and 42/12
1st number: 54/84, 2nd number: 3 6/12
54/84 + 42/12 is 29/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 12 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 84 × 1 = 84,
54/84 = 54 × 1/84 × 1 = 54/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
42/12 = 42 × 7/12 × 7 = 294/84 - Add the two like fractions:
54/84 + 294/84 = 54 + 294/84 = 348/84 - 348/84 simplified gives 29/7
- So, 54/84 + 42/12 = 29/7
In mixed form: 41/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/84+84/12 54/84+42/24 54/84+42/36 54/84+42/60 54/84+42/84