Add 45/12 and 1/20
1st number: 3 9/12, 2nd number: 1/20
45/12 + 1/20 is 19/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 12 × 5 = 60,
45/12 = 45 × 5/12 × 5 = 225/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
1/20 = 1 × 3/20 × 3 = 3/60 - Add the two like fractions:
225/60 + 3/60 = 225 + 3/60 = 228/60 - 228/60 simplified gives 19/5
- So, 45/12 + 1/20 = 19/5
In mixed form: 34/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/12+1/20 45/12+2/20 45/24+1/20 45/12+1/40 45/12+3/20 45/36+1/20 45/12+1/60 45/12+5/20 45/60+1/20 45/12+7/20 45/84+1/20