Subtract 7/75 from 4/90
4/90 - 7/75 is -11/225.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 75 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 90 × 5 = 450,
4/90 = 4 × 5/90 × 5 = 20/450 - Likewise, for the 2nd fraction, since 75 × 6 = 450,
7/75 = 7 × 6/75 × 6 = 42/450 - Subtract the two like fractions:
20/450 - 42/450 = 20 - 42/450 = -22/450 - After reducing the fraction, the answer is -11/225
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/90-7/75 4/90-14/75 12/90-7/75 4/90-21/75 20/90-7/75 4/90-35/75 28/90-7/75 4/90-49/75