Subtract 1/21 from 45/5
1st number: 9 0/5, 2nd number: 1/21
45/5 - 1/21 is 188/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 21 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 5 × 21 = 105,
45/5 = 45 × 21/5 × 21 = 945/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
1/21 = 1 × 5/21 × 5 = 5/105 - Subtract the two like fractions:
945/105 - 5/105 = 945 - 5/105 = 940/105 - After reducing the fraction, the answer is 188/21
- In mixed form: 820/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/5-1/21 45/5-2/21 45/10-1/21 45/5-1/42 45/5-3/21 45/15-1/21 45/5-1/63 45/5-5/21 45/25-1/21 45/5-7/21 45/35-1/21