Subtract 30/45 from 21/14
1st number: 1 7/14, 2nd number: 30/45
21/14 - 30/45 is 5/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 45 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 14 × 45 = 630,
21/14 = 21 × 45/14 × 45 = 945/630 - Likewise, for the 2nd fraction, since 45 × 14 = 630,
30/45 = 30 × 14/45 × 14 = 420/630 - Subtract the two like fractions:
945/630 - 420/630 = 945 - 420/630 = 525/630 - After reducing the fraction, the answer is 5/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/14-30/45 21/14-60/45 21/28-30/45 21/14-30/90 63/14-30/45 21/14-90/45 21/42-30/45 21/70-30/45 21/98-30/45