Add 30/18 and 12/45
1st number: 1 12/18, 2nd number: 12/45
30/18 + 12/45 is 29/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 45 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
30/18 = 30 × 5/18 × 5 = 150/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
12/45 = 12 × 2/45 × 2 = 24/90 - Add the two like fractions:
150/90 + 24/90 = 150 + 24/90 = 174/90 - 174/90 simplified gives 29/15
- So, 30/18 + 12/45 = 29/15
In mixed form: 114/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/18+12/45 30/18+24/45 30/36+12/45 30/18+12/90 90/18+12/45 30/18+36/45 30/54+12/45 30/18+60/45 30/90+12/45 30/18+84/45