Add 90/28 and 12/18
1st number: 3 6/28, 2nd number: 12/18
90/28 + 12/18 is 163/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 18 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 28 × 9 = 252,
90/28 = 90 × 9/28 × 9 = 810/252 - Likewise, for the 2nd fraction, since 18 × 14 = 252,
12/18 = 12 × 14/18 × 14 = 168/252 - Add the two like fractions:
810/252 + 168/252 = 810 + 168/252 = 978/252 - 978/252 simplified gives 163/42
- So, 90/28 + 12/18 = 163/42
In mixed form: 337/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/28+24/18 90/56+12/18 90/28+12/36 90/28+36/18 90/84+12/18 90/28+12/54 90/28+60/18 90/28+12/90 90/28+84/18