Subtract 3/70 from 75/21
1st number: 3 12/21, 2nd number: 3/70
75/21 - 3/70 is 247/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
75/21 = 75 × 10/21 × 10 = 750/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
3/70 = 3 × 3/70 × 3 = 9/210 - Subtract the two like fractions:
750/210 - 9/210 = 750 - 9/210 = 741/210 - After reducing the fraction, the answer is 247/70
- In mixed form: 337/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/21-6/70 75/42-3/70 75/21-9/70 75/63-3/70 75/21-15/70 75/21-21/70