Subtract 21/90 from 3/14
3/14 - 21/90 is -2/105.
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,
21/90 = 21 × 7/90 × 7 = 147/630 - Subtract the two like fractions:
135/630 - 147/630 = 135 - 147/630 = -12/630 - After reducing the fraction, the answer is -2/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/14-21/90 3/14-42/90 3/28-21/90 9/14-21/90 3/14-63/90 3/42-21/90 15/14-21/90 3/70-21/90 21/14-21/90 3/98-21/90