Subtract 30/10 from 21/5
1st number: 4 1/5, 2nd number: 3 0/10
21/5 - 30/10 is 6/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 10 is 10
Next, find the equivalent fraction of both fractional numbers with denominator 10 - For the 1st fraction, since 5 × 2 = 10,
21/5 = 21 × 2/5 × 2 = 42/10 - Likewise, for the 2nd fraction, since 10 × 1 = 10,
30/10 = 30 × 1/10 × 1 = 30/10 - Subtract the two like fractions:
42/10 - 30/10 = 42 - 30/10 = 12/10 - After reducing the fraction, the answer is 6/5
- In mixed form: 11/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/5-30/10 21/5-60/10 21/10-30/10 21/5-30/20 63/5-30/10 21/5-90/10 21/15-30/10 21/25-30/10 21/5-30/50 21/35-30/10 21/5-30/70