Subtract 9/30 from 45/12
1st number: 3 9/12, 2nd number: 9/30
45/12 - 9/30 is 69/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 30 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 30 × 2 = 60,
9/30 = 9 × 2/30 × 2 = 18/60 - Subtract the two like fractions:
225/60 - 18/60 = 225 - 18/60 = 207/60 - After reducing the fraction, the answer is 69/20
- In mixed form: 39/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/12-9/30 45/12-18/30 45/24-9/30 45/12-9/60 45/12-27/30 45/36-9/30 45/12-9/90 45/12-45/30 45/60-9/30 45/12-63/30 45/84-9/30