Subtract 1/7 from 75/21
1st number: 3 12/21, 2nd number: 1/7
75/21 - 1/7 is 24/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 7 is 21
Next, find the equivalent fraction of both fractional numbers with denominator 21 - For the 1st fraction, since 21 × 1 = 21,
75/21 = 75 × 1/21 × 1 = 75/21 - Likewise, for the 2nd fraction, since 7 × 3 = 21,
1/7 = 1 × 3/7 × 3 = 3/21 - Subtract the two like fractions:
75/21 - 3/21 = 75 - 3/21 = 72/21 - After reducing the fraction, the answer is 24/7
- In mixed form: 33/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/21-2/7 75/42-1/7 75/21-1/14 75/21-3/7 75/63-1/7 75/21-1/21 75/21-5/7 75/21-1/35 75/21-1/49