Subtract 80/40 from 3/4
1st number: 3/4, 2nd number: 2 0/40
3/4 - 80/40 is -5/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 4 × 10 = 40,
3/4 = 3 × 10/4 × 10 = 30/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
80/40 = 80 × 1/40 × 1 = 80/40 - Subtract the two like fractions:
30/40 - 80/40 = 30 - 80/40 = -50/40 - After reducing the fraction, the answer is -5/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/4-80/40 3/8-80/40 9/4-80/40 3/12-80/40 15/4-80/40 3/20-80/40 21/4-80/40 3/28-80/40