Add 15/45 and 28/70
15/45 + 28/70 is 11/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 45 × 14 = 630,
15/45 = 15 × 14/45 × 14 = 210/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
28/70 = 28 × 9/70 × 9 = 252/630 - Add the two like fractions:
210/630 + 252/630 = 210 + 252/630 = 462/630 - 462/630 simplified gives 11/15
- So, 15/45 + 28/70 = 11/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/45+28/70 15/45+56/70 15/90+28/70 15/45+84/70 75/45+28/70