Add 18/20 and 3/7
18/20 + 3/7 is 93/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 7 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
18/20 = 18 × 7/20 × 7 = 126/140 - Likewise, for the 2nd fraction, since 7 × 20 = 140,
3/7 = 3 × 20/7 × 20 = 60/140 - Add the two like fractions:
126/140 + 60/140 = 126 + 60/140 = 186/140 - 186/140 simplified gives 93/70
- So, 18/20 + 3/7 = 93/70
In mixed form: 123/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/20+3/7 18/20+6/7 18/40+3/7 18/20+3/14 54/20+3/7 18/20+9/7 18/60+3/7 18/20+3/21 90/20+3/7 18/20+15/7 18/20+3/35 18/20+21/7 18/20+3/49