Add 1/70 and 90/81
1st number: 1/70, 2nd number: 1 9/81
1/70 + 90/81 is 709/630.
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,
1/70 = 1 × 81/70 × 81 = 81/5670 - Likewise, for the 2nd fraction, since 81 × 70 = 5670,
90/81 = 90 × 70/81 × 70 = 6300/5670 - Add the two like fractions:
81/5670 + 6300/5670 = 81 + 6300/5670 = 6381/5670 - 6381/5670 simplified gives 709/630
- So, 1/70 + 90/81 = 709/630
In mixed form: 179/630
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/70+90/81 3/70+90/81 5/70+90/81 7/70+90/81