Subtract 80/14 from 40/21
1st number: 1 19/21, 2nd number: 5 10/14
40/21 - 80/14 is -80/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 14 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
40/21 = 40 × 2/21 × 2 = 80/42 - Likewise, for the 2nd fraction, since 14 × 3 = 42,
80/14 = 80 × 3/14 × 3 = 240/42 - Subtract the two like fractions:
80/42 - 240/42 = 80 - 240/42 = -160/42 - After reducing the fraction, the answer is -80/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/21-80/14 40/42-80/14 40/21-80/28 40/63-80/14 40/21-80/42 40/21-80/70 40/21-80/98