Subtract 20/90 from 3/14
3/14 - 20/90 is -1/126.
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,
3/14 = 3 × 45/14 × 45 = 135/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
20/90 = 20 × 7/90 × 7 = 140/630 - Subtract the two like fractions:
135/630 - 140/630 = 135 - 140/630 = -5/630 - After reducing the fraction, the answer is -1/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/14-20/90 3/14-40/90 3/28-20/90 9/14-20/90 3/14-60/90 3/42-20/90 15/14-20/90 3/70-20/90 21/14-20/90 3/98-20/90