Subtract 30/15 from 8/90
1st number: 8/90, 2nd number: 2 0/15
8/90 - 30/15 is -86/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 15 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
8/90 = 8 × 1/90 × 1 = 8/90 - Likewise, for the 2nd fraction, since 15 × 6 = 90,
30/15 = 30 × 6/15 × 6 = 180/90 - Subtract the two like fractions:
8/90 - 180/90 = 8 - 180/90 = -172/90 - After reducing the fraction, the answer is -86/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/90-30/15 8/90-60/15 24/90-30/15 8/90-90/15 8/90-30/45 40/90-30/15 8/90-30/75 56/90-30/15