Add 20/21 and 48/70
20/21 + 48/70 is 172/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
20/21 = 20 × 10/21 × 10 = 200/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
48/70 = 48 × 3/70 × 3 = 144/210 - Add the two like fractions:
200/210 + 144/210 = 200 + 144/210 = 344/210 - 344/210 simplified gives 172/105
- So, 20/21 + 48/70 = 172/105
In mixed form: 167/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/21+48/70 20/21+96/70 20/42+48/70 60/21+48/70 20/63+48/70