Add 18/8 and 8/5
1st number: 2 2/8, 2nd number: 1 3/5
18/8 + 8/5 is 77/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 5 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 8 × 5 = 40,
18/8 = 18 × 5/8 × 5 = 90/40 - Likewise, for the 2nd fraction, since 5 × 8 = 40,
8/5 = 8 × 8/5 × 8 = 64/40 - Add the two like fractions:
90/40 + 64/40 = 90 + 64/40 = 154/40 - 154/40 simplified gives 77/20
- So, 18/8 + 8/5 = 77/20
In mixed form: 317/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/8+8/5 18/8+16/5 18/16+8/5 18/8+8/10 54/8+8/5 18/8+24/5 18/24+8/5 18/8+8/15 90/8+8/5 18/8+40/5 18/40+8/5 18/8+8/25 18/8+56/5 18/56+8/5 18/8+8/35