Subtract 24/45 from 9/20
9/20 - 24/45 is -1/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 45 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
9/20 = 9 × 9/20 × 9 = 81/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
24/45 = 24 × 4/45 × 4 = 96/180 - Subtract the two like fractions:
81/180 - 96/180 = 81 - 96/180 = -15/180 - After reducing the fraction, the answer is -1/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/20-24/45 9/20-48/45 9/40-24/45 9/20-24/90 27/20-24/45 9/20-72/45 9/60-24/45 45/20-24/45 63/20-24/45