Add 7/70 and 4/81
7/70 + 4/81 is 121/810.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 81 is 5670
Next, find the equivalent fraction of both fractional numbers with denominator 5670 - For the 1st fraction, since 70 × 81 = 5670,
7/70 = 7 × 81/70 × 81 = 567/5670 - Likewise, for the 2nd fraction, since 81 × 70 = 5670,
4/81 = 4 × 70/81 × 70 = 280/5670 - Add the two like fractions:
567/5670 + 280/5670 = 567 + 280/5670 = 847/5670 - 847/5670 simplified gives 121/810
- So, 7/70 + 4/81 = 121/810
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/70+4/81 7/70+8/81 21/70+4/81 7/70+12/81 35/70+4/81 7/70+20/81 49/70+4/81 7/70+28/81