Subtract 42/45 from 12/14
12/14 - 42/45 is -8/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 45 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 14 × 45 = 630,
12/14 = 12 × 45/14 × 45 = 540/630 - Likewise, for the 2nd fraction, since 45 × 14 = 630,
42/45 = 42 × 14/45 × 14 = 588/630 - Subtract the two like fractions:
540/630 - 588/630 = 540 - 588/630 = -48/630 - After reducing the fraction, the answer is -8/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/14-42/45 12/14-84/45 12/28-42/45 12/14-42/90 36/14-42/45 12/42-42/45 60/14-42/45 12/70-42/45 84/14-42/45 12/98-42/45