Add 35/21 and 54/20
1st number: 1 14/21, 2nd number: 2 14/20
35/21 + 54/20 is 131/30.
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,
35/21 = 35 × 20/21 × 20 = 700/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
54/20 = 54 × 21/20 × 21 = 1134/420 - Add the two like fractions:
700/420 + 1134/420 = 700 + 1134/420 = 1834/420 - 1834/420 simplified gives 131/30
- So, 35/21 + 54/20 = 131/30
In mixed form: 411/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/21+54/20 35/42+54/20 35/21+54/40 35/63+54/20 35/21+54/60