Add 21/28 and 10/70
21/28 + 10/70 is 25/28.
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,
21/28 = 21 × 5/28 × 5 = 105/140 - Likewise, for the 2nd fraction, since 70 × 2 = 140,
10/70 = 10 × 2/70 × 2 = 20/140 - Add the two like fractions:
105/140 + 20/140 = 105 + 20/140 = 125/140 - 125/140 simplified gives 25/28
- So, 21/28 + 10/70 = 25/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/28+10/70 21/28+20/70 21/56+10/70 63/28+10/70 21/28+30/70 21/84+10/70 21/28+50/70