Subtract 32/20 from 18/30
1st number: 18/30, 2nd number: 1 12/20
18/30 - 32/20 is -1/1.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 30 × 2 = 60,
18/30 = 18 × 2/30 × 2 = 36/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
32/20 = 32 × 3/20 × 3 = 96/60 - Subtract the two like fractions:
36/60 - 96/60 = 36 - 96/60 = -60/60 - After reducing the fraction, the answer is -1/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/30-32/20 18/30-64/20 18/60-32/20 18/30-32/40 54/30-32/20 18/30-96/20 18/90-32/20 18/30-32/60 90/30-32/20