Subtract 10/35 from 21/18
1st number: 1 3/18, 2nd number: 10/35
21/18 - 10/35 is 37/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 35 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 18 × 35 = 630,
21/18 = 21 × 35/18 × 35 = 735/630 - Likewise, for the 2nd fraction, since 35 × 18 = 630,
10/35 = 10 × 18/35 × 18 = 180/630 - Subtract the two like fractions:
735/630 - 180/630 = 735 - 180/630 = 555/630 - After reducing the fraction, the answer is 37/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/18-10/35 21/18-20/35 21/36-10/35 21/18-10/70 63/18-10/35 21/18-30/35 21/54-10/35 21/18-50/35 21/90-10/35 21/18-70/35