Add 20/21 and 4/70
20/21 + 4/70 is 106/105.
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,
4/70 = 4 × 3/70 × 3 = 12/210 - Add the two like fractions:
200/210 + 12/210 = 200 + 12/210 = 212/210 - 212/210 simplified gives 106/105
- So, 20/21 + 4/70 = 106/105
In mixed form: 11/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/21+4/70 20/21+8/70 20/42+4/70 60/21+4/70 20/21+12/70 20/63+4/70 20/21+20/70 20/21+28/70