Subtract 3/10 from 42/30
1st number: 1 12/30, 2nd number: 3/10
42/30 - 3/10 is 11/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 10 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 30 × 1 = 30,
42/30 = 42 × 1/30 × 1 = 42/30 - Likewise, for the 2nd fraction, since 10 × 3 = 30,
3/10 = 3 × 3/10 × 3 = 9/30 - Subtract the two like fractions:
42/30 - 9/30 = 42 - 9/30 = 33/30 - After reducing the fraction, the answer is 11/10
- In mixed form: 11/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/30-3/10 42/30-6/10 42/60-3/10 42/30-3/20 42/30-9/10 42/90-3/10 42/30-3/30 42/30-15/10 42/30-3/50 42/30-21/10 42/30-3/70