Subtract 12/20 from 45/7
1st number: 6 3/7, 2nd number: 12/20
45/7 - 12/20 is 204/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 7 × 20 = 140,
45/7 = 45 × 20/7 × 20 = 900/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
12/20 = 12 × 7/20 × 7 = 84/140 - Subtract the two like fractions:
900/140 - 84/140 = 900 - 84/140 = 816/140 - After reducing the fraction, the answer is 204/35
- In mixed form: 529/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/7-12/20 45/7-24/20 45/14-12/20 45/7-12/40 45/7-36/20 45/21-12/20 45/7-12/60 45/7-60/20 45/35-12/20 45/7-84/20 45/49-12/20