Add 18/7 and 18/20
1st number: 2 4/7, 2nd number: 18/20
18/7 + 18/20 is 243/70.
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,
18/7 = 18 × 20/7 × 20 = 360/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
18/20 = 18 × 7/20 × 7 = 126/140 - Add the two like fractions:
360/140 + 126/140 = 360 + 126/140 = 486/140 - 486/140 simplified gives 243/70
- So, 18/7 + 18/20 = 243/70
In mixed form: 333/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/7+18/20 18/7+36/20 18/14+18/20 18/7+18/40 54/7+18/20 18/7+54/20 18/21+18/20 18/7+18/60 90/7+18/20 18/7+90/20 18/35+18/20 18/49+18/20