Add 12/28 and 54/42
1st number: 12/28, 2nd number: 1 12/42
12/28 + 54/42 is 12/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 42 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 28 × 3 = 84,
12/28 = 12 × 3/28 × 3 = 36/84 - Likewise, for the 2nd fraction, since 42 × 2 = 84,
54/42 = 54 × 2/42 × 2 = 108/84 - Add the two like fractions:
36/84 + 108/84 = 36 + 108/84 = 144/84 - 144/84 simplified gives 12/7
- So, 12/28 + 54/42 = 12/7
In mixed form: 15/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/28+54/42 12/56+54/42 12/28+54/84 36/28+54/42 12/84+54/42 60/28+54/42 84/28+54/42