Add 1/28 and 21/70
1/28 + 21/70 is 47/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 70 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 28 × 5 = 140,
1/28 = 1 × 5/28 × 5 = 5/140 - Likewise, for the 2nd fraction, since 70 × 2 = 140,
21/70 = 21 × 2/70 × 2 = 42/140 - Add the two like fractions:
5/140 + 42/140 = 5 + 42/140 = 47/140 - So, 1/28 + 21/70 = 47/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/28+21/70 1/28+42/70 1/56+21/70 3/28+21/70 1/28+63/70 1/84+21/70 5/28+21/70 7/28+21/70