Subtract 9/72 from 70/4
1st number: 17 2/4, 2nd number: 9/72
70/4 - 9/72 is 139/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 72 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 4 × 18 = 72,
70/4 = 70 × 18/4 × 18 = 1260/72 - Likewise, for the 2nd fraction, since 72 × 1 = 72,
9/72 = 9 × 1/72 × 1 = 9/72 - Subtract the two like fractions:
1260/72 - 9/72 = 1260 - 9/72 = 1251/72 - After reducing the fraction, the answer is 139/8
- In mixed form: 173/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/4-18/72 70/8-9/72 70/4-27/72 70/12-9/72 70/4-45/72 70/20-9/72 70/4-63/72 70/28-9/72