Subtract 21/40 from 10/75
10/75 - 21/40 is -47/120.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 40 is 600
Next, find the equivalent fraction of both fractional numbers with denominator 600 - For the 1st fraction, since 75 × 8 = 600,
10/75 = 10 × 8/75 × 8 = 80/600 - Likewise, for the 2nd fraction, since 40 × 15 = 600,
21/40 = 21 × 15/40 × 15 = 315/600 - Subtract the two like fractions:
80/600 - 315/600 = 80 - 315/600 = -235/600 - After reducing the fraction, the answer is -47/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/75-21/40 10/75-42/40 10/75-21/80 30/75-21/40 10/75-63/40 50/75-21/40 70/75-21/40