Subtract 7/30 from 25/21
1st number: 1 4/21, 2nd number: 7/30
25/21 - 7/30 is 67/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
25/21 = 25 × 10/21 × 10 = 250/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
7/30 = 7 × 7/30 × 7 = 49/210 - Subtract the two like fractions:
250/210 - 49/210 = 250 - 49/210 = 201/210 - After reducing the fraction, the answer is 67/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/21-7/30 25/21-14/30 25/42-7/30 25/21-7/60 75/21-7/30 25/21-21/30 25/63-7/30 25/21-7/90 25/21-35/30 25/21-49/30