Subtract 30/15 from 10/8
1st number: 1 2/8, 2nd number: 2 0/15
10/8 - 30/15 is -3/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 15 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 8 × 15 = 120,
10/8 = 10 × 15/8 × 15 = 150/120 - Likewise, for the 2nd fraction, since 15 × 8 = 120,
30/15 = 30 × 8/15 × 8 = 240/120 - Subtract the two like fractions:
150/120 - 240/120 = 150 - 240/120 = -90/120 - After reducing the fraction, the answer is -3/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/8-30/15 10/8-60/15 10/16-30/15 30/8-30/15 10/8-90/15 10/24-30/15 10/8-30/45 50/8-30/15 10/40-30/15 10/8-30/75 70/8-30/15 10/56-30/15