Add 42/45 and 21/14
1st number: 42/45, 2nd number: 1 7/14
42/45 + 21/14 is 73/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 14 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 45 × 14 = 630,
42/45 = 42 × 14/45 × 14 = 588/630 - Likewise, for the 2nd fraction, since 14 × 45 = 630,
21/14 = 21 × 45/14 × 45 = 945/630 - Add the two like fractions:
588/630 + 945/630 = 588 + 945/630 = 1533/630 - 1533/630 simplified gives 73/30
- So, 42/45 + 21/14 = 73/30
In mixed form: 213/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/45+21/14 42/45+42/14 42/90+21/14 42/45+21/28 42/45+63/14 42/45+21/42 42/45+21/70 42/45+21/98