Subtract 20/90 from 72/6
1st number: 12 0/6, 2nd number: 20/90
72/6 - 20/90 is 106/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 6 × 15 = 90,
72/6 = 72 × 15/6 × 15 = 1080/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
20/90 = 20 × 1/90 × 1 = 20/90 - Subtract the two like fractions:
1080/90 - 20/90 = 1080 - 20/90 = 1060/90 - After reducing the fraction, the answer is 106/9
- In mixed form: 117/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/6-40/90 72/12-20/90 72/6-60/90 72/18-20/90 72/30-20/90 72/42-20/90