Subtract 42/21 from 14/9
1st number: 1 5/9, 2nd number: 2 0/21
14/9 - 42/21 is -4/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 21 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 9 × 7 = 63,
14/9 = 14 × 7/9 × 7 = 98/63 - Likewise, for the 2nd fraction, since 21 × 3 = 63,
42/21 = 42 × 3/21 × 3 = 126/63 - Subtract the two like fractions:
98/63 - 126/63 = 98 - 126/63 = -28/63 - After reducing the fraction, the answer is -4/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 28/9-42/21 14/9-84/21 14/18-42/21 42/9-42/21 14/27-42/21 14/9-42/63 70/9-42/21 14/45-42/21 98/9-42/21 14/63-42/21