Subtract 27/72 from 70/42
1st number: 1 28/42, 2nd number: 27/72
70/42 - 27/72 is 31/24.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 42 × 12 = 504,
70/42 = 70 × 12/42 × 12 = 840/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
27/72 = 27 × 7/72 × 7 = 189/504 - Subtract the two like fractions:
840/504 - 189/504 = 840 - 189/504 = 651/504 - After reducing the fraction, the answer is 31/24
- In mixed form: 17/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/42-54/72 70/84-27/72 70/42-81/72