Add 5/21 and 56/45
1st number: 5/21, 2nd number: 1 11/45
5/21 + 56/45 is 467/315.
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,
5/21 = 5 × 15/21 × 15 = 75/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
56/45 = 56 × 7/45 × 7 = 392/315 - Add the two like fractions:
75/315 + 392/315 = 75 + 392/315 = 467/315 - So, 5/21 + 56/45 = 467/315
In mixed form: 1152/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/21+56/45 5/42+56/45 5/21+56/90 15/21+56/45 5/63+56/45 25/21+56/45 35/21+56/45