Subtract 1/70 from 45/21
1st number: 2 3/21, 2nd number: 1/70
45/21 - 1/70 is 149/70.
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,
45/21 = 45 × 10/21 × 10 = 450/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
1/70 = 1 × 3/70 × 3 = 3/210 - Subtract the two like fractions:
450/210 - 3/210 = 450 - 3/210 = 447/210 - After reducing the fraction, the answer is 149/70
- In mixed form: 29/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/21-1/70 45/21-2/70 45/42-1/70 45/21-3/70 45/63-1/70 45/21-5/70 45/21-7/70