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