Add 18/28 and 27/40
18/28 + 27/40 is 369/280.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 28 × 10 = 280,
18/28 = 18 × 10/28 × 10 = 180/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
27/40 = 27 × 7/40 × 7 = 189/280 - Add the two like fractions:
180/280 + 189/280 = 180 + 189/280 = 369/280 - So, 18/28 + 27/40 = 369/280
In mixed form: 189/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/28+27/40 18/28+54/40 18/56+27/40 18/28+27/80 54/28+27/40 18/28+81/40 18/84+27/40 90/28+27/40