Subtract 54/20 from 21/14
1st number: 1 7/14, 2nd number: 2 14/20
21/14 - 54/20 is -6/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 14 × 10 = 140,
21/14 = 21 × 10/14 × 10 = 210/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
54/20 = 54 × 7/20 × 7 = 378/140 - Subtract the two like fractions:
210/140 - 378/140 = 210 - 378/140 = -168/140 - After reducing the fraction, the answer is -6/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/14-54/20 21/28-54/20 21/14-54/40 63/14-54/20 21/42-54/20 21/14-54/60 21/70-54/20 21/98-54/20