Subtract 45/40 from 15/35
1st number: 15/35, 2nd number: 1 5/40
15/35 - 45/40 is -39/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 35 × 8 = 280,
15/35 = 15 × 8/35 × 8 = 120/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
45/40 = 45 × 7/40 × 7 = 315/280 - Subtract the two like fractions:
120/280 - 315/280 = 120 - 315/280 = -195/280 - After reducing the fraction, the answer is -39/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/35-45/40 15/35-90/40 15/70-45/40 15/35-45/80 45/35-45/40 75/35-45/40