Add 12/90 and 20/18
1st number: 12/90, 2nd number: 1 2/18
12/90 + 20/18 is 56/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
12/90 = 12 × 1/90 × 1 = 12/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
20/18 = 20 × 5/18 × 5 = 100/90 - Add the two like fractions:
12/90 + 100/90 = 12 + 100/90 = 112/90 - 112/90 simplified gives 56/45
- So, 12/90 + 20/18 = 56/45
In mixed form: 111/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/90+20/18 12/90+40/18 12/90+20/36 36/90+20/18 12/90+60/18 12/90+20/54 60/90+20/18 12/90+20/90 84/90+20/18