Subtract 80/8 from 4/20
1st number: 4/20, 2nd number: 10 0/8
4/20 - 80/8 is -49/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 8 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 20 × 2 = 40,
4/20 = 4 × 2/20 × 2 = 8/40 - Likewise, for the 2nd fraction, since 8 × 5 = 40,
80/8 = 80 × 5/8 × 5 = 400/40 - Subtract the two like fractions:
8/40 - 400/40 = 8 - 400/40 = -392/40 - After reducing the fraction, the answer is -49/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/20-80/8 4/40-80/8 4/20-80/16 12/20-80/8 4/60-80/8 4/20-80/24 4/20-80/40 28/20-80/8 4/20-80/56