Subtract 75/40 from 15/20
1st number: 15/20, 2nd number: 1 35/40
15/20 - 75/40 is -9/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 20 × 2 = 40,
15/20 = 15 × 2/20 × 2 = 30/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
75/40 = 75 × 1/40 × 1 = 75/40 - Subtract the two like fractions:
30/40 - 75/40 = 30 - 75/40 = -45/40 - After reducing the fraction, the answer is -9/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/20-75/40 15/40-75/40 15/20-75/80 45/20-75/40 15/60-75/40 75/20-75/40