Subtract 27/42 from 42/20
1st number: 2 2/20, 2nd number: 27/42
42/20 - 27/42 is 51/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 42 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
42/20 = 42 × 21/20 × 21 = 882/420 - Likewise, for the 2nd fraction, since 42 × 10 = 420,
27/42 = 27 × 10/42 × 10 = 270/420 - Subtract the two like fractions:
882/420 - 270/420 = 882 - 270/420 = 612/420 - After reducing the fraction, the answer is 51/35
- In mixed form: 116/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/20-27/42 42/20-54/42 42/40-27/42 42/20-27/84 42/20-81/42 42/60-27/42