Subtract 12/45 from 20/7
1st number: 2 6/7, 2nd number: 12/45
20/7 - 12/45 is 272/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 45 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 7 × 45 = 315,
20/7 = 20 × 45/7 × 45 = 900/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
12/45 = 12 × 7/45 × 7 = 84/315 - Subtract the two like fractions:
900/315 - 84/315 = 900 - 84/315 = 816/315 - After reducing the fraction, the answer is 272/105
- In mixed form: 262/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/7-12/45 20/7-24/45 20/14-12/45 20/7-12/90 60/7-12/45 20/7-36/45 20/21-12/45 20/7-60/45 20/35-12/45 20/7-84/45 20/49-12/45