Add 28/30 and 54/42
1st number: 28/30, 2nd number: 1 12/42
28/30 + 54/42 is 233/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
28/30 = 28 × 7/30 × 7 = 196/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
54/42 = 54 × 5/42 × 5 = 270/210 - Add the two like fractions:
196/210 + 270/210 = 196 + 270/210 = 466/210 - 466/210 simplified gives 233/105
- So, 28/30 + 54/42 = 233/105
In mixed form: 223/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/30+54/42 28/60+54/42 28/30+54/84 84/30+54/42 28/90+54/42