Add 12/20 and 18/16
1st number: 12/20, 2nd number: 1 2/16
12/20 + 18/16 is 69/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 16 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 20 × 4 = 80,
12/20 = 12 × 4/20 × 4 = 48/80 - Likewise, for the 2nd fraction, since 16 × 5 = 80,
18/16 = 18 × 5/16 × 5 = 90/80 - Add the two like fractions:
48/80 + 90/80 = 48 + 90/80 = 138/80 - 138/80 simplified gives 69/40
- So, 12/20 + 18/16 = 69/40
In mixed form: 129/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/20+18/16 12/20+36/16 12/40+18/16 12/20+18/32 36/20+18/16 12/20+54/16 12/60+18/16 12/20+18/48 60/20+18/16 12/20+90/16 12/20+18/80 84/20+18/16