Subtract 12/18 from 1/40
1/40 - 12/18 is -77/120.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 18 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
1/40 = 1 × 9/40 × 9 = 9/360 - Likewise, for the 2nd fraction, since 18 × 20 = 360,
12/18 = 12 × 20/18 × 20 = 240/360 - Subtract the two like fractions:
9/360 - 240/360 = 9 - 240/360 = -231/360 - After reducing the fraction, the answer is -77/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/40-12/18 1/40-24/18 1/80-12/18 1/40-12/36 3/40-12/18 1/40-36/18 1/40-12/54 5/40-12/18 1/40-60/18 1/40-12/90 7/40-12/18 1/40-84/18