Add 45/42 and 56/21
1st number: 1 3/42, 2nd number: 2 14/21
45/42 + 56/21 is 157/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
45/42 = 45 × 1/42 × 1 = 45/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
56/21 = 56 × 2/21 × 2 = 112/42 - Add the two like fractions:
45/42 + 112/42 = 45 + 112/42 = 157/42 - So, 45/42 + 56/21 = 157/42
In mixed form: 331/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/42+56/21 45/84+56/21 45/42+56/42 45/42+56/63