Add 18/40 and 90/12
1st number: 18/40, 2nd number: 7 6/12
18/40 + 90/12 is 159/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 12 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 40 × 3 = 120,
18/40 = 18 × 3/40 × 3 = 54/120 - Likewise, for the 2nd fraction, since 12 × 10 = 120,
90/12 = 90 × 10/12 × 10 = 900/120 - Add the two like fractions:
54/120 + 900/120 = 54 + 900/120 = 954/120 - 954/120 simplified gives 159/20
- So, 18/40 + 90/12 = 159/20
In mixed form: 719/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/40+90/12 18/80+90/12 18/40+90/24 54/40+90/12 18/40+90/36 90/40+90/12 18/40+90/60 18/40+90/84