Add 18/20 and 90/60
1st number: 18/20, 2nd number: 1 30/60
18/20 + 90/60 is 12/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 60 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
18/20 = 18 × 3/20 × 3 = 54/60 - Likewise, for the 2nd fraction, since 60 × 1 = 60,
90/60 = 90 × 1/60 × 1 = 90/60 - Add the two like fractions:
54/60 + 90/60 = 54 + 90/60 = 144/60 - 144/60 simplified gives 12/5
- So, 18/20 + 90/60 = 12/5
In mixed form: 22/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/20+90/60 18/40+90/60 54/20+90/60 18/60+90/60 90/20+90/60