Subtract 7/42 from 54/20
1st number: 2 14/20, 2nd number: 7/42
54/20 - 7/42 is 38/15.
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,
54/20 = 54 × 21/20 × 21 = 1134/420 - Likewise, for the 2nd fraction, since 42 × 10 = 420,
7/42 = 7 × 10/42 × 10 = 70/420 - Subtract the two like fractions:
1134/420 - 70/420 = 1134 - 70/420 = 1064/420 - After reducing the fraction, the answer is 38/15
- In mixed form: 28/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/20-14/42 54/40-7/42 54/20-7/84 54/20-21/42 54/60-7/42 54/20-35/42 54/20-49/42