Subtract 42/14 from 50/21
1st number: 2 8/21, 2nd number: 3 0/14
50/21 - 42/14 is -13/21.
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,
50/21 = 50 × 2/21 × 2 = 100/42 - Likewise, for the 2nd fraction, since 14 × 3 = 42,
42/14 = 42 × 3/14 × 3 = 126/42 - Subtract the two like fractions:
100/42 - 126/42 = 100 - 126/42 = -26/42 - After reducing the fraction, the answer is -13/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/21-84/14 50/42-42/14 50/21-42/28 50/63-42/14 50/21-42/70 50/21-42/98