Subtract 15/20 from 30/5
1st number: 6 0/5, 2nd number: 15/20
30/5 - 15/20 is 21/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 5 × 4 = 20,
30/5 = 30 × 4/5 × 4 = 120/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
15/20 = 15 × 1/20 × 1 = 15/20 - Subtract the two like fractions:
120/20 - 15/20 = 120 - 15/20 = 105/20 - After reducing the fraction, the answer is 21/4
- In mixed form: 51/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/5-15/20 30/5-30/20 30/10-15/20 30/5-15/40 90/5-15/20 30/5-45/20 30/15-15/20 30/5-15/60 30/5-75/20 30/25-15/20 30/35-15/20