Add 90/42 and 18/9
1st number: 2 6/42, 2nd number: 2 0/9
90/42 + 18/9 is 29/7.
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,
90/42 = 90 × 3/42 × 3 = 270/126 - Likewise, for the 2nd fraction, since 9 × 14 = 126,
18/9 = 18 × 14/9 × 14 = 252/126 - Add the two like fractions:
270/126 + 252/126 = 270 + 252/126 = 522/126 - 522/126 simplified gives 29/7
- So, 90/42 + 18/9 = 29/7
In mixed form: 41/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/42+36/9 90/84+18/9 90/42+54/9 90/42+18/27 90/42+90/9 90/42+18/45 90/42+18/63