Add 15/8 and 12/15
1st number: 1 7/8, 2nd number: 12/15
15/8 + 12/15 is 107/40.
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,
15/8 = 15 × 15/8 × 15 = 225/120 - Likewise, for the 2nd fraction, since 15 × 8 = 120,
12/15 = 12 × 8/15 × 8 = 96/120 - Add the two like fractions:
225/120 + 96/120 = 225 + 96/120 = 321/120 - 321/120 simplified gives 107/40
- So, 15/8 + 12/15 = 107/40
In mixed form: 227/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/8+12/15 15/8+24/15 15/16+12/15 15/8+12/30 45/8+12/15 15/8+36/15 15/24+12/15 15/8+12/45 75/8+12/15 15/8+60/15 15/40+12/15 15/8+12/75 15/8+84/15 15/56+12/15