Subtract 45/15 from 12/8
1st number: 1 4/8, 2nd number: 3 0/15
12/8 - 45/15 is -3/2.
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,
12/8 = 12 × 15/8 × 15 = 180/120 - Likewise, for the 2nd fraction, since 15 × 8 = 120,
45/15 = 45 × 8/15 × 8 = 360/120 - Subtract the two like fractions:
180/120 - 360/120 = 180 - 360/120 = -180/120 - After reducing the fraction, the answer is -3/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/8-45/15 12/8-90/15 12/16-45/15 12/8-45/30 36/8-45/15 12/24-45/15 60/8-45/15 12/40-45/15 12/8-45/75 84/8-45/15 12/56-45/15