Add 28/18 and 18/90
1st number: 1 10/18, 2nd number: 18/90
28/18 + 18/90 is 79/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
28/18 = 28 × 5/18 × 5 = 140/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
18/90 = 18 × 1/90 × 1 = 18/90 - Add the two like fractions:
140/90 + 18/90 = 140 + 18/90 = 158/90 - 158/90 simplified gives 79/45
- So, 28/18 + 18/90 = 79/45
In mixed form: 134/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/18+18/90 28/18+36/90 28/36+18/90 84/18+18/90 28/18+54/90 28/54+18/90 28/90+18/90