Subtract 24/35 from 15/40
15/40 - 24/35 is -87/280.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 35 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 40 × 7 = 280,
15/40 = 15 × 7/40 × 7 = 105/280 - Likewise, for the 2nd fraction, since 35 × 8 = 280,
24/35 = 24 × 8/35 × 8 = 192/280 - Subtract the two like fractions:
105/280 - 192/280 = 105 - 192/280 = -87/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/40-24/35 15/40-48/35 15/80-24/35 15/40-24/70 45/40-24/35 15/40-72/35 75/40-24/35