Subtract 1/70 from 25/21
1st number: 1 4/21, 2nd number: 1/70
25/21 - 1/70 is 247/210.
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,
25/21 = 25 × 10/21 × 10 = 250/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
1/70 = 1 × 3/70 × 3 = 3/210 - Subtract the two like fractions:
250/210 - 3/210 = 250 - 3/210 = 247/210 - In mixed form: 137/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/21-1/70 25/21-2/70 25/42-1/70 75/21-1/70 25/21-3/70 25/63-1/70 25/21-5/70 25/21-7/70