Subtract 18/24 from 9/20
9/20 - 18/24 is -3/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 24 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 20 × 6 = 120,
9/20 = 9 × 6/20 × 6 = 54/120 - Likewise, for the 2nd fraction, since 24 × 5 = 120,
18/24 = 18 × 5/24 × 5 = 90/120 - Subtract the two like fractions:
54/120 - 90/120 = 54 - 90/120 = -36/120 - After reducing the fraction, the answer is -3/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/20-18/24 9/20-36/24 9/40-18/24 9/20-18/48 27/20-18/24 9/20-54/24 9/60-18/24 9/20-18/72 45/20-18/24 9/20-90/24 63/20-18/24