Add 15/70 and 28/56
15/70 + 28/56 is 5/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 56 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 56 × 5 = 280,
28/56 = 28 × 5/56 × 5 = 140/280 - Add the two like fractions:
60/280 + 140/280 = 60 + 140/280 = 200/280 - 200/280 simplified gives 5/7
- So, 15/70 + 28/56 = 5/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/70+28/56 45/70+28/56 15/70+84/56 75/70+28/56