Subtract 2/90 from 14/21
14/21 - 2/90 is 29/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 21 × 30 = 630,
14/21 = 14 × 30/21 × 30 = 420/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
2/90 = 2 × 7/90 × 7 = 14/630 - Subtract the two like fractions:
420/630 - 14/630 = 420 - 14/630 = 406/630 - After reducing the fraction, the answer is 29/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 28/21-2/90 14/21-4/90 14/42-2/90 42/21-2/90 14/21-6/90 14/63-2/90 70/21-2/90 14/21-10/90 98/21-2/90 14/21-14/90