Add 50/70 and 30/18
1st number: 50/70, 2nd number: 1 12/18
50/70 + 30/18 is 50/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 18 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 70 × 9 = 630,
50/70 = 50 × 9/70 × 9 = 450/630 - Likewise, for the 2nd fraction, since 18 × 35 = 630,
30/18 = 30 × 35/18 × 35 = 1050/630 - Add the two like fractions:
450/630 + 1050/630 = 450 + 1050/630 = 1500/630 - 1500/630 simplified gives 50/21
- So, 50/70 + 30/18 = 50/21
In mixed form: 28/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/70+60/18 50/70+30/36 50/70+90/18 50/70+30/54 50/70+30/90