Subtract 75/12 from 70/40
1st number: 1 30/40, 2nd number: 6 3/12
70/40 - 75/12 is -9/2.
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,
70/40 = 70 × 3/40 × 3 = 210/120 - Likewise, for the 2nd fraction, since 12 × 10 = 120,
75/12 = 75 × 10/12 × 10 = 750/120 - Subtract the two like fractions:
210/120 - 750/120 = 210 - 750/120 = -540/120 - After reducing the fraction, the answer is -9/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/80-75/12 70/40-75/24 70/40-75/36 70/40-75/60 70/40-75/84