Subtract 40/12 from 18/70
1st number: 18/70, 2nd number: 3 4/12
18/70 - 40/12 is -323/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 12 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 70 × 6 = 420,
18/70 = 18 × 6/70 × 6 = 108/420 - Likewise, for the 2nd fraction, since 12 × 35 = 420,
40/12 = 40 × 35/12 × 35 = 1400/420 - Subtract the two like fractions:
108/420 - 1400/420 = 108 - 1400/420 = -1292/420 - After reducing the fraction, the answer is -323/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/70-40/12 18/70-80/12 18/70-40/24 54/70-40/12 18/70-40/36 90/70-40/12 18/70-40/60 18/70-40/84