Add 15/18 and 50/70
15/18 + 50/70 is 65/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 18 × 35 = 630,
15/18 = 15 × 35/18 × 35 = 525/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
50/70 = 50 × 9/70 × 9 = 450/630 - Add the two like fractions:
525/630 + 450/630 = 525 + 450/630 = 975/630 - 975/630 simplified gives 65/42
- So, 15/18 + 50/70 = 65/42
In mixed form: 123/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/18+50/70 15/36+50/70 45/18+50/70 15/54+50/70 75/18+50/70 15/90+50/70