Add 20/14 and 90/81
1st number: 1 6/14, 2nd number: 1 9/81
20/14 + 90/81 is 160/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 81 is 1134
Next, find the equivalent fraction of both fractional numbers with denominator 1134 - For the 1st fraction, since 14 × 81 = 1134,
20/14 = 20 × 81/14 × 81 = 1620/1134 - Likewise, for the 2nd fraction, since 81 × 14 = 1134,
90/81 = 90 × 14/81 × 14 = 1260/1134 - Add the two like fractions:
1620/1134 + 1260/1134 = 1620 + 1260/1134 = 2880/1134 - 2880/1134 simplified gives 160/63
- So, 20/14 + 90/81 = 160/63
In mixed form: 234/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/14+90/81 20/28+90/81 60/14+90/81 20/42+90/81 20/70+90/81 20/98+90/81