Subtract 12/84 from 30/10
1st number: 3 0/10, 2nd number: 12/84
30/10 - 12/84 is 20/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 10 × 42 = 420,
30/10 = 30 × 42/10 × 42 = 1260/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
12/84 = 12 × 5/84 × 5 = 60/420 - Subtract the two like fractions:
1260/420 - 60/420 = 1260 - 60/420 = 1200/420 - After reducing the fraction, the answer is 20/7
- In mixed form: 26/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/10-12/84 30/10-24/84 30/20-12/84 90/10-12/84 30/10-36/84 30/10-60/84 30/50-12/84 30/70-12/84