Add 54/42 and 84/28
1st number: 1 12/42, 2nd number: 3 0/28
54/42 + 84/28 is 30/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 28 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 42 × 2 = 84,
54/42 = 54 × 2/42 × 2 = 108/84 - Likewise, for the 2nd fraction, since 28 × 3 = 84,
84/28 = 84 × 3/28 × 3 = 252/84 - Add the two like fractions:
108/84 + 252/84 = 108 + 252/84 = 360/84 - 360/84 simplified gives 30/7
- So, 54/42 + 84/28 = 30/7
In mixed form: 42/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/84+84/28 54/42+84/56