Subtract 4/21 from 30/4
1st number: 7 2/4, 2nd number: 4/21
30/4 - 4/21 is 307/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 4 × 21 = 84,
30/4 = 30 × 21/4 × 21 = 630/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
4/21 = 4 × 4/21 × 4 = 16/84 - Subtract the two like fractions:
630/84 - 16/84 = 630 - 16/84 = 614/84 - After reducing the fraction, the answer is 307/42
- In mixed form: 713/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/4-4/21 30/4-8/21 30/8-4/21 30/4-4/42 90/4-4/21 30/4-12/21 30/12-4/21 30/4-4/63 30/4-20/21 30/20-4/21 30/4-28/21 30/28-4/21