Subtract 10/4 from 75/21
1st number: 3 12/21, 2nd number: 2 2/4
75/21 - 10/4 is 15/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 4 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
75/21 = 75 × 4/21 × 4 = 300/84 - Likewise, for the 2nd fraction, since 4 × 21 = 84,
10/4 = 10 × 21/4 × 21 = 210/84 - Subtract the two like fractions:
300/84 - 210/84 = 300 - 210/84 = 90/84 - After reducing the fraction, the answer is 15/14
- In mixed form: 11/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/21-20/4 75/42-10/4 75/21-10/8 75/21-30/4 75/63-10/4 75/21-10/12 75/21-50/4 75/21-10/20 75/21-70/4 75/21-10/28