Subtract 27/21 from 42/10
1st number: 4 2/10, 2nd number: 1 6/21
42/10 - 27/21 is 102/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 10 × 21 = 210,
42/10 = 42 × 21/10 × 21 = 882/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
27/21 = 27 × 10/21 × 10 = 270/210 - Subtract the two like fractions:
882/210 - 270/210 = 882 - 270/210 = 612/210 - After reducing the fraction, the answer is 102/35
- In mixed form: 232/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/10-27/21 42/10-54/21 42/20-27/21 42/10-27/42 42/10-81/21 42/30-27/21 42/10-27/63 42/50-27/21 42/70-27/21