Add 21/70 and 6/7
21/70 + 6/7 is 81/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 7 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 70 × 1 = 70,
21/70 = 21 × 1/70 × 1 = 21/70 - Likewise, for the 2nd fraction, since 7 × 10 = 70,
6/7 = 6 × 10/7 × 10 = 60/70 - Add the two like fractions:
21/70 + 60/70 = 21 + 60/70 = 81/70 - So, 21/70 + 6/7 = 81/70
In mixed form: 111/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/70+6/7 21/70+12/7 21/70+6/14 63/70+6/7 21/70+18/7 21/70+6/21 21/70+30/7 21/70+6/35 21/70+42/7 21/70+6/49