Subtract 3/40 from 12/9
1st number: 1 3/9, 2nd number: 3/40
12/9 - 3/40 is 151/120.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 9 × 40 = 360,
12/9 = 12 × 40/9 × 40 = 480/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
3/40 = 3 × 9/40 × 9 = 27/360 - Subtract the two like fractions:
480/360 - 27/360 = 480 - 27/360 = 453/360 - After reducing the fraction, the answer is 151/120
- In mixed form: 131/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/9-3/40 12/9-6/40 12/18-3/40 12/9-3/80 36/9-3/40 12/9-9/40 12/27-3/40 60/9-3/40 12/9-15/40 12/45-3/40 84/9-3/40 12/9-21/40 12/63-3/40