Subtract 40/20 from 3/8
1st number: 3/8, 2nd number: 2 0/20
3/8 - 40/20 is -13/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 20 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 8 × 5 = 40,
3/8 = 3 × 5/8 × 5 = 15/40 - Likewise, for the 2nd fraction, since 20 × 2 = 40,
40/20 = 40 × 2/20 × 2 = 80/40 - Subtract the two like fractions:
15/40 - 80/40 = 15 - 80/40 = -65/40 - After reducing the fraction, the answer is -13/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/8-40/20 3/8-80/20 3/16-40/20 9/8-40/20 3/24-40/20 3/8-40/60 15/8-40/20 3/40-40/20 21/8-40/20 3/56-40/20