Add 5/70 and 21/28
5/70 + 21/28 is 23/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 28 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 70 × 2 = 140,
5/70 = 5 × 2/70 × 2 = 10/140 - Likewise, for the 2nd fraction, since 28 × 5 = 140,
21/28 = 21 × 5/28 × 5 = 105/140 - Add the two like fractions:
10/140 + 105/140 = 10 + 105/140 = 115/140 - 115/140 simplified gives 23/28
- So, 5/70 + 21/28 = 23/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/70+21/28 5/70+42/28 5/70+21/56 15/70+21/28 5/70+63/28 5/70+21/84 25/70+21/28 35/70+21/28