Subtract 5/45 from 25/21
1st number: 1 4/21, 2nd number: 5/45
25/21 - 5/45 is 68/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 45 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 21 × 15 = 315,
25/21 = 25 × 15/21 × 15 = 375/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
5/45 = 5 × 7/45 × 7 = 35/315 - Subtract the two like fractions:
375/315 - 35/315 = 375 - 35/315 = 340/315 - After reducing the fraction, the answer is 68/63
- In mixed form: 15/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/21-5/45 25/21-10/45 25/42-5/45 25/21-5/90 75/21-5/45 25/21-15/45 25/63-5/45 25/21-25/45 25/21-35/45