Add 15/42 and 28/45
15/42 + 28/45 is 617/630.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 45 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 42 × 15 = 630,
15/42 = 15 × 15/42 × 15 = 225/630 - Likewise, for the 2nd fraction, since 45 × 14 = 630,
28/45 = 28 × 14/45 × 14 = 392/630 - Add the two like fractions:
225/630 + 392/630 = 225 + 392/630 = 617/630 - So, 15/42 + 28/45 = 617/630
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/42+28/45 15/42+56/45 15/84+28/45 15/42+28/90 45/42+28/45 15/42+84/45 75/42+28/45