Subtract 30/12 from 10/40
1st number: 10/40, 2nd number: 2 6/12
10/40 - 30/12 is -9/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 12 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 40 × 3 = 120,
10/40 = 10 × 3/40 × 3 = 30/120 - Likewise, for the 2nd fraction, since 12 × 10 = 120,
30/12 = 30 × 10/12 × 10 = 300/120 - Subtract the two like fractions:
30/120 - 300/120 = 30 - 300/120 = -270/120 - After reducing the fraction, the answer is -9/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/40-30/12 10/40-60/12 10/80-30/12 10/40-30/24 30/40-30/12 10/40-90/12 10/40-30/36 50/40-30/12 10/40-30/60 70/40-30/12 10/40-30/84