Subtract 27/42 from 7/4
1st number: 1 3/4, 2nd number: 27/42
7/4 - 27/42 is 31/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 42 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 4 × 21 = 84,
7/4 = 7 × 21/4 × 21 = 147/84 - Likewise, for the 2nd fraction, since 42 × 2 = 84,
27/42 = 27 × 2/42 × 2 = 54/84 - Subtract the two like fractions:
147/84 - 54/84 = 147 - 54/84 = 93/84 - After reducing the fraction, the answer is 31/28
- In mixed form: 13/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/4-27/42 7/4-54/42 7/8-27/42 7/4-27/84 21/4-27/42 7/4-81/42 7/12-27/42 35/4-27/42 7/20-27/42 49/4-27/42 7/28-27/42