Subtract 15/90 from 20/14
1st number: 1 6/14, 2nd number: 15/90
20/14 - 15/90 is 53/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 14 × 45 = 630,
20/14 = 20 × 45/14 × 45 = 900/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
15/90 = 15 × 7/90 × 7 = 105/630 - Subtract the two like fractions:
900/630 - 105/630 = 900 - 105/630 = 795/630 - After reducing the fraction, the answer is 53/42
- In mixed form: 111/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/14-15/90 20/14-30/90 20/28-15/90 60/14-15/90 20/14-45/90 20/42-15/90 20/14-75/90 20/70-15/90 20/98-15/90