Subtract 7/21 from 14/45
14/45 - 7/21 is -1/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 21 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 45 × 7 = 315,
14/45 = 14 × 7/45 × 7 = 98/315 - Likewise, for the 2nd fraction, since 21 × 15 = 315,
7/21 = 7 × 15/21 × 15 = 105/315 - Subtract the two like fractions:
98/315 - 105/315 = 98 - 105/315 = -7/315 - After reducing the fraction, the answer is -1/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 28/45-7/21 14/45-14/21 14/90-7/21 14/45-7/42 42/45-7/21 14/45-7/63 70/45-7/21 14/45-35/21 98/45-7/21 14/45-49/21