Subtract 54/10 from 21/12
1st number: 1 9/12, 2nd number: 5 4/10
21/12 - 54/10 is -73/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 10 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 12 × 5 = 60,
21/12 = 21 × 5/12 × 5 = 105/60 - Likewise, for the 2nd fraction, since 10 × 6 = 60,
54/10 = 54 × 6/10 × 6 = 324/60 - Subtract the two like fractions:
105/60 - 324/60 = 105 - 324/60 = -219/60 - After reducing the fraction, the answer is -73/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/12-54/10 21/24-54/10 21/12-54/20 63/12-54/10 21/36-54/10 21/12-54/30 21/60-54/10 21/12-54/50 21/84-54/10 21/12-54/70