Subtract 54/10 from 21/2
1st number: 10 1/2, 2nd number: 5 4/10
21/2 - 54/10 is 51/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 10 is 10
Next, find the equivalent fraction of both fractional numbers with denominator 10 - For the 1st fraction, since 2 × 5 = 10,
21/2 = 21 × 5/2 × 5 = 105/10 - Likewise, for the 2nd fraction, since 10 × 1 = 10,
54/10 = 54 × 1/10 × 1 = 54/10 - Subtract the two like fractions:
105/10 - 54/10 = 105 - 54/10 = 51/10 - In mixed form: 51/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/2-54/10 21/4-54/10 21/2-54/20 63/2-54/10 21/6-54/10 21/2-54/30 21/10-54/10 21/2-54/50 21/14-54/10 21/2-54/70