Subtract 90/75 from 10/40
1st number: 10/40, 2nd number: 1 15/75
10/40 - 90/75 is -19/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 75 is 600
Next, find the equivalent fraction of both fractional numbers with denominator 600 - For the 1st fraction, since 40 × 15 = 600,
10/40 = 10 × 15/40 × 15 = 150/600 - Likewise, for the 2nd fraction, since 75 × 8 = 600,
90/75 = 90 × 8/75 × 8 = 720/600 - Subtract the two like fractions:
150/600 - 720/600 = 150 - 720/600 = -570/600 - After reducing the fraction, the answer is -19/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/40-90/75 10/80-90/75 30/40-90/75 50/40-90/75 70/40-90/75