Add 45/42 and 54/12
1st number: 1 3/42, 2nd number: 4 6/12
45/42 + 54/12 is 39/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 12 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 42 × 2 = 84,
45/42 = 45 × 2/42 × 2 = 90/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
54/12 = 54 × 7/12 × 7 = 378/84 - Add the two like fractions:
90/84 + 378/84 = 90 + 378/84 = 468/84 - 468/84 simplified gives 39/7
- So, 45/42 + 54/12 = 39/7
In mixed form: 54/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/42+54/12 45/84+54/12 45/42+54/24 45/42+54/36 45/42+54/60 45/42+54/84