Subtract 21/18 from 35/10
1st number: 3 5/10, 2nd number: 1 3/18
35/10 - 21/18 is 7/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 10 × 9 = 90,
35/10 = 35 × 9/10 × 9 = 315/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
21/18 = 21 × 5/18 × 5 = 105/90 - Subtract the two like fractions:
315/90 - 105/90 = 315 - 105/90 = 210/90 - After reducing the fraction, the answer is 7/3
- In mixed form: 21/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/10-21/18 35/10-42/18 35/20-21/18 35/10-21/36 35/10-63/18 35/30-21/18 35/10-21/54 35/50-21/18 35/10-21/90 35/70-21/18