Subtract 20/15 from 45/14
1st number: 3 3/14, 2nd number: 1 5/15
45/14 - 20/15 is 79/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 15 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 14 × 15 = 210,
45/14 = 45 × 15/14 × 15 = 675/210 - Likewise, for the 2nd fraction, since 15 × 14 = 210,
20/15 = 20 × 14/15 × 14 = 280/210 - Subtract the two like fractions:
675/210 - 280/210 = 675 - 280/210 = 395/210 - After reducing the fraction, the answer is 79/42
- In mixed form: 137/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/14-20/15 45/14-40/15 45/28-20/15 45/14-20/30 45/14-60/15 45/42-20/15 45/14-20/45 45/70-20/15 45/14-20/75 45/98-20/15