Subtract 45/8 from 45/15
1st number: 3 0/15, 2nd number: 5 5/8
45/15 - 45/8 is -21/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 8 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 15 × 8 = 120,
45/15 = 45 × 8/15 × 8 = 360/120 - Likewise, for the 2nd fraction, since 8 × 15 = 120,
45/8 = 45 × 15/8 × 15 = 675/120 - Subtract the two like fractions:
360/120 - 675/120 = 360 - 675/120 = -315/120 - After reducing the fraction, the answer is -21/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/15-45/8 45/15-90/8 45/30-45/8 45/15-45/16 45/15-45/24 45/75-45/8 45/15-45/40 45/15-45/56