Add 15/70 and 42/8
1st number: 15/70, 2nd number: 5 2/8
15/70 + 42/8 is 153/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 8 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 70 × 4 = 280,
15/70 = 15 × 4/70 × 4 = 60/280 - Likewise, for the 2nd fraction, since 8 × 35 = 280,
42/8 = 42 × 35/8 × 35 = 1470/280 - Add the two like fractions:
60/280 + 1470/280 = 60 + 1470/280 = 1530/280 - 1530/280 simplified gives 153/28
- So, 15/70 + 42/8 = 153/28
In mixed form: 513/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/70+42/8 15/70+84/8 15/70+42/16 45/70+42/8 15/70+42/24 75/70+42/8 15/70+42/40 15/70+42/56