Subtract 3/40 from 8/80
8/80 - 3/40 is 1/40.
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,
8/80 = 8 × 1/80 × 1 = 8/80 - Likewise, for the 2nd fraction, since 40 × 2 = 80,
3/40 = 3 × 2/40 × 2 = 6/80 - Subtract the two like fractions:
8/80 - 6/80 = 8 - 6/80 = 2/80 - After reducing the fraction, the answer is 1/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/80-3/40 8/80-6/40 8/80-3/80 24/80-3/40 8/80-9/40 40/80-3/40 8/80-15/40 56/80-3/40 8/80-21/40