Add 15/20 and 4/7
15/20 + 4/7 is 37/28.
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,
15/20 = 15 × 7/20 × 7 = 105/140 - Likewise, for the 2nd fraction, since 7 × 20 = 140,
4/7 = 4 × 20/7 × 20 = 80/140 - Add the two like fractions:
105/140 + 80/140 = 105 + 80/140 = 185/140 - 185/140 simplified gives 37/28
- So, 15/20 + 4/7 = 37/28
In mixed form: 19/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/20+4/7 15/20+8/7 15/40+4/7 15/20+4/14 45/20+4/7 15/20+12/7 15/60+4/7 15/20+4/21 75/20+4/7 15/20+20/7 15/20+4/35 15/20+28/7 15/20+4/49