Subtract 45/21 from 70/4
1st number: 17 2/4, 2nd number: 2 3/21
70/4 - 45/21 is 215/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 4 × 21 = 84,
70/4 = 70 × 21/4 × 21 = 1470/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
45/21 = 45 × 4/21 × 4 = 180/84 - Subtract the two like fractions:
1470/84 - 180/84 = 1470 - 180/84 = 1290/84 - After reducing the fraction, the answer is 215/14
- In mixed form: 155/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/4-90/21 70/8-45/21 70/4-45/42 70/12-45/21 70/4-45/63 70/20-45/21 70/28-45/21