Subtract 20/10 from 15/18
1st number: 15/18, 2nd number: 2 0/10
15/18 - 20/10 is -7/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 10 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
15/18 = 15 × 5/18 × 5 = 75/90 - Likewise, for the 2nd fraction, since 10 × 9 = 90,
20/10 = 20 × 9/10 × 9 = 180/90 - Subtract the two like fractions:
75/90 - 180/90 = 75 - 180/90 = -105/90 - After reducing the fraction, the answer is -7/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/18-20/10 15/18-40/10 15/36-20/10 45/18-20/10 15/18-60/10 15/54-20/10 15/18-20/30 75/18-20/10 15/90-20/10 15/18-20/50 15/18-20/70