Subtract 90/75 from 9/40
1st number: 9/40, 2nd number: 1 15/75
9/40 - 90/75 is -39/40.
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,
9/40 = 9 × 15/40 × 15 = 135/600 - Likewise, for the 2nd fraction, since 75 × 8 = 600,
90/75 = 90 × 8/75 × 8 = 720/600 - Subtract the two like fractions:
135/600 - 720/600 = 135 - 720/600 = -585/600 - After reducing the fraction, the answer is -39/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/40-90/75 9/80-90/75 27/40-90/75 45/40-90/75 63/40-90/75