Subtract 20/90 from 16/12
1st number: 1 4/12, 2nd number: 20/90
16/12 - 20/90 is 10/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 12 × 15 = 180,
16/12 = 16 × 15/12 × 15 = 240/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
20/90 = 20 × 2/90 × 2 = 40/180 - Subtract the two like fractions:
240/180 - 40/180 = 240 - 40/180 = 200/180 - After reducing the fraction, the answer is 10/9
- In mixed form: 11/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/12-20/90 16/12-40/90 16/24-20/90 48/12-20/90 16/12-60/90 16/36-20/90 80/12-20/90 16/60-20/90 16/84-20/90