Subtract 42/27 from 20/4
1st number: 5 0/4, 2nd number: 1 15/27
20/4 - 42/27 is 31/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 27 is 108
Next, find the equivalent fraction of both fractional numbers with denominator 108 - For the 1st fraction, since 4 × 27 = 108,
20/4 = 20 × 27/4 × 27 = 540/108 - Likewise, for the 2nd fraction, since 27 × 4 = 108,
42/27 = 42 × 4/27 × 4 = 168/108 - Subtract the two like fractions:
540/108 - 168/108 = 540 - 168/108 = 372/108 - After reducing the fraction, the answer is 31/9
- In mixed form: 34/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/4-42/27 20/4-84/27 20/8-42/27 20/4-42/54 60/4-42/27 20/12-42/27 20/4-42/81 20/28-42/27