Subtract 15/80 from 42/12
1st number: 3 6/12, 2nd number: 15/80
42/12 - 15/80 is 53/16.
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,
42/12 = 42 × 20/12 × 20 = 840/240 - Likewise, for the 2nd fraction, since 80 × 3 = 240,
15/80 = 15 × 3/80 × 3 = 45/240 - Subtract the two like fractions:
840/240 - 45/240 = 840 - 45/240 = 795/240 - After reducing the fraction, the answer is 53/16
- In mixed form: 35/16
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/12-15/80 42/12-30/80 42/24-15/80 42/12-45/80 42/36-15/80 42/12-75/80 42/60-15/80 42/84-15/80