Subtract 90/20 from 15/3
1st number: 5 0/3, 2nd number: 4 10/20
15/3 - 90/20 is 1/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 3 × 20 = 60,
15/3 = 15 × 20/3 × 20 = 300/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
90/20 = 90 × 3/20 × 3 = 270/60 - Subtract the two like fractions:
300/60 - 270/60 = 300 - 270/60 = 30/60 - After reducing the fraction, the answer is 1/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/3-90/20 15/6-90/20 15/3-90/40 45/3-90/20 15/9-90/20 15/3-90/60 75/3-90/20 15/21-90/20