Subtract 4/90 from 1/75
1/75 - 4/90 is -7/225.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 90 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 75 × 6 = 450,
1/75 = 1 × 6/75 × 6 = 6/450 - Likewise, for the 2nd fraction, since 90 × 5 = 450,
4/90 = 4 × 5/90 × 5 = 20/450 - Subtract the two like fractions:
6/450 - 20/450 = 6 - 20/450 = -14/450 - After reducing the fraction, the answer is -7/225
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/75-4/90 1/75-8/90 3/75-4/90 1/75-12/90 5/75-4/90 1/75-20/90 7/75-4/90 1/75-28/90