Subtract 1/80 from 15/12
1st number: 1 3/12, 2nd number: 1/80
15/12 - 1/80 is 99/80.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 80 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 12 × 20 = 240,
15/12 = 15 × 20/12 × 20 = 300/240 - Likewise, for the 2nd fraction, since 80 × 3 = 240,
1/80 = 1 × 3/80 × 3 = 3/240 - Subtract the two like fractions:
300/240 - 3/240 = 300 - 3/240 = 297/240 - After reducing the fraction, the answer is 99/80
- In mixed form: 119/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/12-1/80 15/12-2/80 15/24-1/80 45/12-1/80 15/12-3/80 15/36-1/80 75/12-1/80 15/12-5/80 15/60-1/80 15/12-7/80 15/84-1/80