Add 80/8 and 42/15
1st number: 10 0/8, 2nd number: 2 12/15
80/8 + 42/15 is 64/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 15 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 8 × 15 = 120,
80/8 = 80 × 15/8 × 15 = 1200/120 - Likewise, for the 2nd fraction, since 15 × 8 = 120,
42/15 = 42 × 8/15 × 8 = 336/120 - Add the two like fractions:
1200/120 + 336/120 = 1200 + 336/120 = 1536/120 - 1536/120 simplified gives 64/5
- So, 80/8 + 42/15 = 64/5
In mixed form: 124/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/8+84/15 80/16+42/15 80/8+42/30 80/24+42/15 80/8+42/45 80/40+42/15 80/8+42/75 80/56+42/15