Subtract 49/20 from 45/12
1st number: 3 9/12, 2nd number: 2 9/20
45/12 - 49/20 is 13/10.
Steps for subtracting 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,
49/20 = 49 × 3/20 × 3 = 147/60 - Subtract the two like fractions:
225/60 - 147/60 = 225 - 147/60 = 78/60 - After reducing the fraction, the answer is 13/10
- In mixed form: 13/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/12-49/20 45/12-98/20 45/24-49/20 45/12-49/40 45/36-49/20 45/12-49/60 45/60-49/20 45/84-49/20