Subtract 21/12 from 80/8
1st number: 10 0/8, 2nd number: 1 9/12
80/8 - 21/12 is 33/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 12 is 24
Next, find the equivalent fraction of both fractional numbers with denominator 24 - For the 1st fraction, since 8 × 3 = 24,
80/8 = 80 × 3/8 × 3 = 240/24 - Likewise, for the 2nd fraction, since 12 × 2 = 24,
21/12 = 21 × 2/12 × 2 = 42/24 - Subtract the two like fractions:
240/24 - 42/24 = 240 - 42/24 = 198/24 - After reducing the fraction, the answer is 33/4
- In mixed form: 81/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/8-42/12 80/16-21/12 80/8-21/24 80/8-63/12 80/24-21/12 80/8-21/36 80/40-21/12 80/8-21/60 80/56-21/12 80/8-21/84