Subtract 18/7 from 70/3
1st number: 23 1/3, 2nd number: 2 4/7
70/3 - 18/7 is 436/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 7 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 7 × 3 = 21,
18/7 = 18 × 3/7 × 3 = 54/21 - Subtract the two like fractions:
490/21 - 54/21 = 490 - 54/21 = 436/21 - In mixed form: 2016/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/3-36/7 70/6-18/7 70/3-18/14 70/3-54/7 70/9-18/7 70/3-18/21 70/3-90/7 70/15-18/7 70/3-18/35 70/21-18/7 70/3-18/49