Add 42/14 and 54/20
1st number: 3 0/14, 2nd number: 2 14/20
42/14 + 54/20 is 57/10.
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,
42/14 = 42 × 10/14 × 10 = 420/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
54/20 = 54 × 7/20 × 7 = 378/140 - Add the two like fractions:
420/140 + 378/140 = 420 + 378/140 = 798/140 - 798/140 simplified gives 57/10
- So, 42/14 + 54/20 = 57/10
In mixed form: 57/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/14+54/20 42/28+54/20 42/14+54/40 42/14+54/60 42/70+54/20 42/98+54/20