Subtract 90/7 from 45/75
1st number: 45/75, 2nd number: 12 6/7
45/75 - 90/7 is -429/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 7 is 525
Next, find the equivalent fraction of both fractional numbers with denominator 525 - For the 1st fraction, since 75 × 7 = 525,
45/75 = 45 × 7/75 × 7 = 315/525 - Likewise, for the 2nd fraction, since 7 × 75 = 525,
90/7 = 90 × 75/7 × 75 = 6750/525 - Subtract the two like fractions:
315/525 - 6750/525 = 315 - 6750/525 = -6435/525 - After reducing the fraction, the answer is -429/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/75-90/7 45/75-90/14 45/75-90/21 45/75-90/35 45/75-90/49