Subtract 70/54 from 21/2
1st number: 10 1/2, 2nd number: 1 16/54
21/2 - 70/54 is 497/54.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 54 is 54
Next, find the equivalent fraction of both fractional numbers with denominator 54 - For the 1st fraction, since 2 × 27 = 54,
21/2 = 21 × 27/2 × 27 = 567/54 - Likewise, for the 2nd fraction, since 54 × 1 = 54,
70/54 = 70 × 1/54 × 1 = 70/54 - Subtract the two like fractions:
567/54 - 70/54 = 567 - 70/54 = 497/54 - In mixed form: 911/54
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/2-70/54 21/4-70/54 63/2-70/54 21/6-70/54 21/10-70/54 21/14-70/54