Add 18/81 and 90/70
1st number: 18/81, 2nd number: 1 20/70
18/81 + 90/70 is 95/63.
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,
18/81 = 18 × 70/81 × 70 = 1260/5670 - Likewise, for the 2nd fraction, since 70 × 81 = 5670,
90/70 = 90 × 81/70 × 81 = 7290/5670 - Add the two like fractions:
1260/5670 + 7290/5670 = 1260 + 7290/5670 = 8550/5670 - 8550/5670 simplified gives 95/63
- So, 18/81 + 90/70 = 95/63
In mixed form: 132/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/81+90/70 54/81+90/70 90/81+90/70