Add 50/45 and 21/42
1st number: 1 5/45, 2nd number: 21/42
50/45 + 21/42 is 29/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 42 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 45 × 14 = 630,
50/45 = 50 × 14/45 × 14 = 700/630 - Likewise, for the 2nd fraction, since 42 × 15 = 630,
21/42 = 21 × 15/42 × 15 = 315/630 - Add the two like fractions:
700/630 + 315/630 = 700 + 315/630 = 1015/630 - 1015/630 simplified gives 29/18
- So, 50/45 + 21/42 = 29/18
In mixed form: 111/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/90+21/42 50/45+21/84 50/45+63/42