Add 10/8 and 28/40
1st number: 1 2/8, 2nd number: 28/40
10/8 + 28/40 is 39/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 8 × 5 = 40,
10/8 = 10 × 5/8 × 5 = 50/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
28/40 = 28 × 1/40 × 1 = 28/40 - Add the two like fractions:
50/40 + 28/40 = 50 + 28/40 = 78/40 - 78/40 simplified gives 39/20
- So, 10/8 + 28/40 = 39/20
In mixed form: 119/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/8+28/40 10/8+56/40 10/16+28/40 10/8+28/80 30/8+28/40 10/8+84/40 10/24+28/40 50/8+28/40 10/40+28/40 70/8+28/40 10/56+28/40