Subtract 14/45 from 21/7
1st number: 3 0/7, 2nd number: 14/45
21/7 - 14/45 is 121/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 45 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 7 × 45 = 315,
21/7 = 21 × 45/7 × 45 = 945/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
14/45 = 14 × 7/45 × 7 = 98/315 - Subtract the two like fractions:
945/315 - 98/315 = 945 - 98/315 = 847/315 - After reducing the fraction, the answer is 121/45
- In mixed form: 231/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/7-14/45 21/7-28/45 21/14-14/45 21/7-14/90 63/7-14/45 21/7-42/45 21/7-70/45 21/35-14/45 21/7-98/45 21/49-14/45