Add 28/8 and 15/40
1st number: 3 4/8, 2nd number: 15/40
28/8 + 15/40 is 31/8.
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,
28/8 = 28 × 5/8 × 5 = 140/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
15/40 = 15 × 1/40 × 1 = 15/40 - Add the two like fractions:
140/40 + 15/40 = 140 + 15/40 = 155/40 - 155/40 simplified gives 31/8
- So, 28/8 + 15/40 = 31/8
In mixed form: 37/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/8+15/40 28/8+30/40 28/16+15/40 28/8+15/80 84/8+15/40 28/8+45/40 28/24+15/40 28/8+75/40 28/40+15/40 28/56+15/40