Subtract 5/42 from 5/20
5/20 - 5/42 is 11/84.
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,
5/20 = 5 × 21/20 × 21 = 105/420 - Likewise, for the 2nd fraction, since 42 × 10 = 420,
5/42 = 5 × 10/42 × 10 = 50/420 - Subtract the two like fractions:
105/420 - 50/420 = 105 - 50/420 = 55/420 - After reducing the fraction, the answer is 11/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/20-5/42 5/20-10/42 5/40-5/42 5/20-5/84 15/20-5/42 5/20-15/42 5/60-5/42 25/20-5/42 5/20-25/42 35/20-5/42 5/20-35/42