Subtract 10/20 from 9/30
9/30 - 10/20 is -1/5.
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,
9/30 = 9 × 2/30 × 2 = 18/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
10/20 = 10 × 3/20 × 3 = 30/60 - Subtract the two like fractions:
18/60 - 30/60 = 18 - 30/60 = -12/60 - After reducing the fraction, the answer is -1/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/30-10/20 9/60-10/20 9/30-10/40 27/30-10/20 9/30-30/20 9/90-10/20 9/30-10/60 45/30-10/20 9/30-50/20 63/30-10/20 9/30-70/20