Add 70/84 and 6/7
70/84 + 6/7 is 71/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 7 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 84 × 1 = 84,
70/84 = 70 × 1/84 × 1 = 70/84 - Likewise, for the 2nd fraction, since 7 × 12 = 84,
6/7 = 6 × 12/7 × 12 = 72/84 - Add the two like fractions:
70/84 + 72/84 = 70 + 72/84 = 142/84 - 142/84 simplified gives 71/42
- So, 70/84 + 6/7 = 71/42
In mixed form: 129/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/84+12/7 70/84+6/14 70/84+18/7 70/84+6/21 70/84+30/7 70/84+6/35 70/84+42/7 70/84+6/49