Add 27/21 and 28/45
1st number: 1 6/21, 2nd number: 28/45
27/21 + 28/45 is 601/315.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 45 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 21 × 15 = 315,
27/21 = 27 × 15/21 × 15 = 405/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
28/45 = 28 × 7/45 × 7 = 196/315 - Add the two like fractions:
405/315 + 196/315 = 405 + 196/315 = 601/315 - So, 27/21 + 28/45 = 601/315
In mixed form: 1286/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/21+28/45 27/21+56/45 27/42+28/45 27/21+28/90 81/21+28/45 27/21+84/45 27/63+28/45