Subtract 12/45 from 81/5
1st number: 16 1/5, 2nd number: 12/45
81/5 - 12/45 is 239/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 45 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 5 × 9 = 45,
81/5 = 81 × 9/5 × 9 = 729/45 - Likewise, for the 2nd fraction, since 45 × 1 = 45,
12/45 = 12 × 1/45 × 1 = 12/45 - Subtract the two like fractions:
729/45 - 12/45 = 729 - 12/45 = 717/45 - After reducing the fraction, the answer is 239/15
- In mixed form: 1514/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/5-24/45 81/10-12/45 81/5-12/90 81/5-36/45 81/15-12/45 81/5-60/45 81/25-12/45 81/5-84/45 81/35-12/45