Add 18/4 and 12/20
1st number: 4 2/4, 2nd number: 12/20
18/4 + 12/20 is 51/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 4 × 5 = 20,
18/4 = 18 × 5/4 × 5 = 90/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
12/20 = 12 × 1/20 × 1 = 12/20 - Add the two like fractions:
90/20 + 12/20 = 90 + 12/20 = 102/20 - 102/20 simplified gives 51/10
- So, 18/4 + 12/20 = 51/10
In mixed form: 51/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/4+12/20 18/4+24/20 18/8+12/20 18/4+12/40 54/4+12/20 18/4+36/20 18/12+12/20 18/4+12/60 90/4+12/20 18/4+60/20 18/20+12/20 18/4+84/20 18/28+12/20