Subtract 6/75 from 7/90
7/90 - 6/75 is -1/450.
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,
7/90 = 7 × 5/90 × 5 = 35/450 - Likewise, for the 2nd fraction, since 75 × 6 = 450,
6/75 = 6 × 6/75 × 6 = 36/450 - Subtract the two like fractions:
35/450 - 36/450 = 35 - 36/450 = -1/450
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/90-6/75 7/90-12/75 21/90-6/75 7/90-18/75 35/90-6/75 7/90-30/75 49/90-6/75 7/90-42/75