Subtract 42/3 from 21/10
1st number: 2 1/10, 2nd number: 14 0/3
21/10 - 42/3 is -119/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 3 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 10 × 3 = 30,
21/10 = 21 × 3/10 × 3 = 63/30 - Likewise, for the 2nd fraction, since 3 × 10 = 30,
42/3 = 42 × 10/3 × 10 = 420/30 - Subtract the two like fractions:
63/30 - 420/30 = 63 - 420/30 = -357/30 - After reducing the fraction, the answer is -119/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/10-42/3 21/10-84/3 21/20-42/3 21/10-42/6 63/10-42/3 21/30-42/3 21/10-42/9 21/50-42/3 21/10-42/15 21/70-42/3 21/10-42/21