Add 54/14 and 21/20
1st number: 3 12/14, 2nd number: 1 1/20
54/14 + 21/20 is 687/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 14 × 10 = 140,
54/14 = 54 × 10/14 × 10 = 540/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
21/20 = 21 × 7/20 × 7 = 147/140 - Add the two like fractions:
540/140 + 147/140 = 540 + 147/140 = 687/140 - So, 54/14 + 21/20 = 687/140
In mixed form: 4127/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/14+42/20 54/28+21/20 54/14+21/40 54/14+63/20 54/42+21/20 54/14+21/60 54/70+21/20 54/98+21/20