Subtract 28/40 from 84/12
1st number: 7 0/12, 2nd number: 28/40
84/12 - 28/40 is 63/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 12 × 10 = 120,
84/12 = 84 × 10/12 × 10 = 840/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
28/40 = 28 × 3/40 × 3 = 84/120 - Subtract the two like fractions:
840/120 - 84/120 = 840 - 84/120 = 756/120 - After reducing the fraction, the answer is 63/10
- In mixed form: 63/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/12-56/40 84/24-28/40 84/12-28/80 84/12-84/40 84/36-28/40 84/60-28/40