Subtract 20/8 from 15/5
1st number: 3 0/5, 2nd number: 2 4/8
15/5 - 20/8 is 1/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 8 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 5 × 8 = 40,
15/5 = 15 × 8/5 × 8 = 120/40 - Likewise, for the 2nd fraction, since 8 × 5 = 40,
20/8 = 20 × 5/8 × 5 = 100/40 - Subtract the two like fractions:
120/40 - 100/40 = 120 - 100/40 = 20/40 - 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: 30/5-20/8 15/5-40/8 15/10-20/8 15/5-20/16 45/5-20/8 15/5-60/8 15/5-20/24 75/5-20/8 15/25-20/8 15/5-20/40 15/35-20/8 15/5-20/56