Add 10/42 and 90/18
1st number: 10/42, 2nd number: 5 0/18
10/42 + 90/18 is 110/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 42 × 3 = 126,
10/42 = 10 × 3/42 × 3 = 30/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
90/18 = 90 × 7/18 × 7 = 630/126 - Add the two like fractions:
30/126 + 630/126 = 30 + 630/126 = 660/126 - 660/126 simplified gives 110/21
- So, 10/42 + 90/18 = 110/21
In mixed form: 55/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/42+90/18 10/84+90/18 10/42+90/36 30/42+90/18 10/42+90/54 50/42+90/18 70/42+90/18