Subtract 15/40 from 8/10
8/10 - 15/40 is 17/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 10 × 4 = 40,
8/10 = 8 × 4/10 × 4 = 32/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
15/40 = 15 × 1/40 × 1 = 15/40 - Subtract the two like fractions:
32/40 - 15/40 = 32 - 15/40 = 17/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/10-15/40 8/10-30/40 8/20-15/40 8/10-15/80 24/10-15/40 8/10-45/40 8/30-15/40 40/10-15/40 8/10-75/40 8/50-15/40 56/10-15/40 8/70-15/40