Subtract 32/20 from 3/9
1st number: 3/9, 2nd number: 1 12/20
3/9 - 32/20 is -19/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 9 × 20 = 180,
3/9 = 3 × 20/9 × 20 = 60/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
32/20 = 32 × 9/20 × 9 = 288/180 - Subtract the two like fractions:
60/180 - 288/180 = 60 - 288/180 = -228/180 - After reducing the fraction, the answer is -19/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/9-32/20 3/9-64/20 3/18-32/20 3/9-32/40 3/9-96/20 3/27-32/20 3/9-32/60 15/9-32/20 3/45-32/20 21/9-32/20 3/63-32/20