Subtract 45/40 from 18/12
1st number: 1 6/12, 2nd number: 1 5/40
18/12 - 45/40 is 3/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 12 × 10 = 120,
18/12 = 18 × 10/12 × 10 = 180/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
45/40 = 45 × 3/40 × 3 = 135/120 - Subtract the two like fractions:
180/120 - 135/120 = 180 - 135/120 = 45/120 - After reducing the fraction, the answer is 3/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/12-45/40 18/12-90/40 18/24-45/40 18/12-45/80 54/12-45/40 18/36-45/40 90/12-45/40 18/60-45/40 18/84-45/40