Subtract 15/20 from 90/10
1st number: 9 0/10, 2nd number: 15/20
90/10 - 15/20 is 33/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 10 × 2 = 20,
90/10 = 90 × 2/10 × 2 = 180/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
15/20 = 15 × 1/20 × 1 = 15/20 - Subtract the two like fractions:
180/20 - 15/20 = 180 - 15/20 = 165/20 - After reducing the fraction, the answer is 33/4
- In mixed form: 81/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/10-30/20 90/20-15/20 90/10-15/40 90/10-45/20 90/30-15/20 90/10-15/60 90/10-75/20 90/50-15/20 90/70-15/20