Add 5/81 and 21/70
5/81 + 21/70 is 293/810.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 70 is 5670
Next, find the equivalent fraction of both fractional numbers with denominator 5670 - For the 1st fraction, since 81 × 70 = 5670,
5/81 = 5 × 70/81 × 70 = 350/5670 - Likewise, for the 2nd fraction, since 70 × 81 = 5670,
21/70 = 21 × 81/70 × 81 = 1701/5670 - Add the two like fractions:
350/5670 + 1701/5670 = 350 + 1701/5670 = 2051/5670 - 2051/5670 simplified gives 293/810
- So, 5/81 + 21/70 = 293/810
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/81+21/70 5/81+42/70 15/81+21/70 5/81+63/70 25/81+21/70 35/81+21/70