Add 28/18 and 42/30
1st number: 1 10/18, 2nd number: 1 12/30
28/18 + 42/30 is 133/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 30 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 30 × 3 = 90,
42/30 = 42 × 3/30 × 3 = 126/90 - Add the two like fractions:
140/90 + 126/90 = 140 + 126/90 = 266/90 - 266/90 simplified gives 133/45
- So, 28/18 + 42/30 = 133/45
In mixed form: 243/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/18+42/30 28/18+84/30 28/36+42/30 28/18+42/60 84/18+42/30 28/54+42/30 28/18+42/90 28/90+42/30