Subtract 20/40 from 20/5
1st number: 4 0/5, 2nd number: 20/40
20/5 - 20/40 is 7/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 5 × 8 = 40,
20/5 = 20 × 8/5 × 8 = 160/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
20/40 = 20 × 1/40 × 1 = 20/40 - Subtract the two like fractions:
160/40 - 20/40 = 160 - 20/40 = 140/40 - After reducing the fraction, the answer is 7/2
- In mixed form: 31/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/5-20/40 20/10-20/40 20/5-20/80 60/5-20/40 20/5-60/40 20/15-20/40 20/25-20/40 20/35-20/40