Add 27/28 and 18/5
1st number: 27/28, 2nd number: 3 3/5
27/28 + 18/5 is 639/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 5 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 28 × 5 = 140,
27/28 = 27 × 5/28 × 5 = 135/140 - Likewise, for the 2nd fraction, since 5 × 28 = 140,
18/5 = 18 × 28/5 × 28 = 504/140 - Add the two like fractions:
135/140 + 504/140 = 135 + 504/140 = 639/140 - So, 27/28 + 18/5 = 639/140
In mixed form: 479/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/28+18/5 27/28+36/5 27/56+18/5 27/28+18/10 81/28+18/5 27/28+54/5 27/84+18/5 27/28+18/15 27/28+90/5 27/28+18/25 27/28+18/35