Add 81/42 and 90/9
1st number: 1 39/42, 2nd number: 10 0/9
81/42 + 90/9 is 167/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 9 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 42 × 3 = 126,
81/42 = 81 × 3/42 × 3 = 243/126 - Likewise, for the 2nd fraction, since 9 × 14 = 126,
90/9 = 90 × 14/9 × 14 = 1260/126 - Add the two like fractions:
243/126 + 1260/126 = 243 + 1260/126 = 1503/126 - 1503/126 simplified gives 167/14
- So, 81/42 + 90/9 = 167/14
In mixed form: 1113/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/84+90/9 81/42+90/18 81/42+90/27 81/42+90/45 81/42+90/63