Add 45/21 and 3/20
1st number: 2 3/21, 2nd number: 3/20
45/21 + 3/20 is 321/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 21 × 20 = 420,
45/21 = 45 × 20/21 × 20 = 900/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
3/20 = 3 × 21/20 × 21 = 63/420 - Add the two like fractions:
900/420 + 63/420 = 900 + 63/420 = 963/420 - 963/420 simplified gives 321/140
- So, 45/21 + 3/20 = 321/140
In mixed form: 241/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/21+3/20 45/21+6/20 45/42+3/20 45/21+3/40 45/21+9/20 45/63+3/20 45/21+3/60 45/21+15/20 45/21+21/20