Subtract 10/90 from 30/75
30/75 - 10/90 is 13/45.
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,
30/75 = 30 × 6/75 × 6 = 180/450 - Likewise, for the 2nd fraction, since 90 × 5 = 450,
10/90 = 10 × 5/90 × 5 = 50/450 - Subtract the two like fractions:
180/450 - 50/450 = 180 - 50/450 = 130/450 - After reducing the fraction, the answer is 13/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/75-10/90 30/75-20/90 90/75-10/90 30/75-30/90 30/75-50/90 30/75-70/90