Subtract 10/90 from 35/21
1st number: 1 14/21, 2nd number: 10/90
35/21 - 10/90 is 14/9.
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,
35/21 = 35 × 30/21 × 30 = 1050/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
10/90 = 10 × 7/90 × 7 = 70/630 - Subtract the two like fractions:
1050/630 - 70/630 = 1050 - 70/630 = 980/630 - After reducing the fraction, the answer is 14/9
- In mixed form: 15/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/21-10/90 35/21-20/90 35/42-10/90 35/21-30/90 35/63-10/90 35/21-50/90 35/21-70/90