Subtract 21/75 from 30/10
1st number: 3 0/10, 2nd number: 21/75
30/10 - 21/75 is 68/25.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 75 is 150
Next, find the equivalent fraction of both fractional numbers with denominator 150 - For the 1st fraction, since 10 × 15 = 150,
30/10 = 30 × 15/10 × 15 = 450/150 - Likewise, for the 2nd fraction, since 75 × 2 = 150,
21/75 = 21 × 2/75 × 2 = 42/150 - Subtract the two like fractions:
450/150 - 42/150 = 450 - 42/150 = 408/150 - After reducing the fraction, the answer is 68/25
- In mixed form: 218/25
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/10-21/75 30/10-42/75 30/20-21/75 90/10-21/75 30/10-63/75 30/50-21/75 30/70-21/75