Subtract 15/40 from 4/80
4/80 - 15/40 is -13/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 40 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 80 × 1 = 80,
4/80 = 4 × 1/80 × 1 = 4/80 - Likewise, for the 2nd fraction, since 40 × 2 = 80,
15/40 = 15 × 2/40 × 2 = 30/80 - Subtract the two like fractions:
4/80 - 30/80 = 4 - 30/80 = -26/80 - After reducing the fraction, the answer is -13/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/80-15/40 4/80-30/40 4/80-15/80 12/80-15/40 4/80-45/40 20/80-15/40 4/80-75/40 28/80-15/40