Add 5/7 and 5/20
5/7 + 5/20 is 27/28.
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,
5/7 = 5 × 20/7 × 20 = 100/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
5/20 = 5 × 7/20 × 7 = 35/140 - Add the two like fractions:
100/140 + 35/140 = 100 + 35/140 = 135/140 - 135/140 simplified gives 27/28
- So, 5/7 + 5/20 = 27/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/7+5/20 5/7+10/20 5/14+5/20 5/7+5/40 15/7+5/20 5/7+15/20 5/21+5/20 5/7+5/60 25/7+5/20 5/7+25/20 5/35+5/20 35/7+5/20 5/7+35/20 5/49+5/20