Subtract 25/21 from 30/2
1st number: 15 0/2, 2nd number: 1 4/21
30/2 - 25/21 is 290/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 2 × 21 = 42,
30/2 = 30 × 21/2 × 21 = 630/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
25/21 = 25 × 2/21 × 2 = 50/42 - Subtract the two like fractions:
630/42 - 50/42 = 630 - 50/42 = 580/42 - After reducing the fraction, the answer is 290/21
- In mixed form: 1317/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/2-25/21 30/2-50/21 30/4-25/21 30/2-25/42 90/2-25/21 30/2-75/21 30/6-25/21 30/2-25/63 30/10-25/21 30/14-25/21