Subtract 4/21 from 45/10
1st number: 4 5/10, 2nd number: 4/21
45/10 - 4/21 is 181/42.
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,
45/10 = 45 × 21/10 × 21 = 945/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
4/21 = 4 × 10/21 × 10 = 40/210 - Subtract the two like fractions:
945/210 - 40/210 = 945 - 40/210 = 905/210 - After reducing the fraction, the answer is 181/42
- In mixed form: 413/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/10-4/21 45/10-8/21 45/20-4/21 45/10-4/42 45/10-12/21 45/30-4/21 45/10-4/63 45/10-20/21 45/50-4/21 45/10-28/21 45/70-4/21