Subtract 12/21 from 70/3
1st number: 23 1/3, 2nd number: 12/21
70/3 - 12/21 is 478/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 21 is 21
Next, find the equivalent fraction of both fractional numbers with denominator 21 - For the 1st fraction, since 3 × 7 = 21,
70/3 = 70 × 7/3 × 7 = 490/21 - Likewise, for the 2nd fraction, since 21 × 1 = 21,
12/21 = 12 × 1/21 × 1 = 12/21 - Subtract the two like fractions:
490/21 - 12/21 = 490 - 12/21 = 478/21 - In mixed form: 2216/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/3-24/21 70/6-12/21 70/3-12/42 70/3-36/21 70/9-12/21 70/3-12/63 70/3-60/21 70/15-12/21 70/3-84/21 70/21-12/21