Add 15/7 and 54/20
1st number: 2 1/7, 2nd number: 2 14/20
15/7 + 54/20 is 339/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 7 × 20 = 140,
15/7 = 15 × 20/7 × 20 = 300/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
54/20 = 54 × 7/20 × 7 = 378/140 - Add the two like fractions:
300/140 + 378/140 = 300 + 378/140 = 678/140 - 678/140 simplified gives 339/70
- So, 15/7 + 54/20 = 339/70
In mixed form: 459/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/7+54/20 15/14+54/20 15/7+54/40 45/7+54/20 15/21+54/20 15/7+54/60 75/7+54/20 15/35+54/20 15/49+54/20