Add 27/20 and 15/8
1st number: 1 7/20, 2nd number: 1 7/8
27/20 + 15/8 is 129/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 8 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 20 × 2 = 40,
27/20 = 27 × 2/20 × 2 = 54/40 - Likewise, for the 2nd fraction, since 8 × 5 = 40,
15/8 = 15 × 5/8 × 5 = 75/40 - Add the two like fractions:
54/40 + 75/40 = 54 + 75/40 = 129/40 - So, 27/20 + 15/8 = 129/40
In mixed form: 39/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/20+15/8 27/20+30/8 27/40+15/8 27/20+15/16 81/20+15/8 27/20+45/8 27/60+15/8 27/20+15/24 27/20+75/8 27/20+15/40 27/20+15/56