Subtract 15/30 from 40/20
1st number: 2 0/20, 2nd number: 15/30
40/20 - 15/30 is 3/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 30 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
40/20 = 40 × 3/20 × 3 = 120/60 - Likewise, for the 2nd fraction, since 30 × 2 = 60,
15/30 = 15 × 2/30 × 2 = 30/60 - Subtract the two like fractions:
120/60 - 30/60 = 120 - 30/60 = 90/60 - After reducing the fraction, the answer is 3/2
- In mixed form: 11/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/20-15/30 40/20-15/60 40/20-45/30 40/60-15/30 40/20-15/90 40/20-75/30