Subtract 21/70 from 35/9
1st number: 3 8/9, 2nd number: 21/70
35/9 - 21/70 is 323/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 9 × 70 = 630,
35/9 = 35 × 70/9 × 70 = 2450/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
21/70 = 21 × 9/70 × 9 = 189/630 - Subtract the two like fractions:
2450/630 - 189/630 = 2450 - 189/630 = 2261/630 - After reducing the fraction, the answer is 323/90
- In mixed form: 353/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/9-21/70 35/9-42/70 35/18-21/70 35/9-63/70 35/27-21/70 35/45-21/70 35/63-21/70