Add 28/70 and 5/20
28/70 + 5/20 is 13/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 70 × 2 = 140,
28/70 = 28 × 2/70 × 2 = 56/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
5/20 = 5 × 7/20 × 7 = 35/140 - Add the two like fractions:
56/140 + 35/140 = 56 + 35/140 = 91/140 - 91/140 simplified gives 13/20
- So, 28/70 + 5/20 = 13/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/70+5/20 28/70+10/20 28/70+5/40 84/70+5/20 28/70+15/20 28/70+5/60 28/70+25/20 28/70+35/20