Subtract 42/18 from 40/14
1st number: 2 12/14, 2nd number: 2 6/18
40/14 - 42/18 is 11/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 14 × 9 = 126,
40/14 = 40 × 9/14 × 9 = 360/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
42/18 = 42 × 7/18 × 7 = 294/126 - Subtract the two like fractions:
360/126 - 294/126 = 360 - 294/126 = 66/126 - After reducing the fraction, the answer is 11/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/14-42/18 40/14-84/18 40/28-42/18 40/14-42/36 40/42-42/18 40/14-42/54 40/70-42/18 40/14-42/90 40/98-42/18