Add 45/21 and 12/20
1st number: 2 3/21, 2nd number: 12/20
45/21 + 12/20 is 96/35.
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,
12/20 = 12 × 21/20 × 21 = 252/420 - Add the two like fractions:
900/420 + 252/420 = 900 + 252/420 = 1152/420 - 1152/420 simplified gives 96/35
- So, 45/21 + 12/20 = 96/35
In mixed form: 226/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/21+12/20 45/21+24/20 45/42+12/20 45/21+12/40 45/21+36/20 45/63+12/20 45/21+12/60 45/21+60/20 45/21+84/20