Add 18/56 and 81/30
1st number: 18/56, 2nd number: 2 21/30
18/56 + 81/30 is 423/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 30 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 56 × 15 = 840,
18/56 = 18 × 15/56 × 15 = 270/840 - Likewise, for the 2nd fraction, since 30 × 28 = 840,
81/30 = 81 × 28/30 × 28 = 2268/840 - Add the two like fractions:
270/840 + 2268/840 = 270 + 2268/840 = 2538/840 - 2538/840 simplified gives 423/140
- So, 18/56 + 81/30 = 423/140
In mixed form: 33/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/56+81/30 18/56+81/60 54/56+81/30 18/56+81/90 90/56+81/30