Add 15/20 and 42/8
1st number: 15/20, 2nd number: 5 2/8
15/20 + 42/8 is 6/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 8 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 20 × 2 = 40,
15/20 = 15 × 2/20 × 2 = 30/40 - Likewise, for the 2nd fraction, since 8 × 5 = 40,
42/8 = 42 × 5/8 × 5 = 210/40 - Add the two like fractions:
30/40 + 210/40 = 30 + 210/40 = 240/40 - 240/40 simplified gives 6/1
- So, 15/20 + 42/8 = 6/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/20+42/8 15/20+84/8 15/40+42/8 15/20+42/16 45/20+42/8 15/60+42/8 15/20+42/24 75/20+42/8 15/20+42/40 15/20+42/56