Add 15/30 and 18/56
15/30 + 18/56 is 23/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 56 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 30 × 28 = 840,
15/30 = 15 × 28/30 × 28 = 420/840 - Likewise, for the 2nd fraction, since 56 × 15 = 840,
18/56 = 18 × 15/56 × 15 = 270/840 - Add the two like fractions:
420/840 + 270/840 = 420 + 270/840 = 690/840 - 690/840 simplified gives 23/28
- So, 15/30 + 18/56 = 23/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 15/30+36/56 15/60+18/56 45/30+18/56 15/30+54/56 15/90+18/56 75/30+18/56 15/30+90/56