Subtract 30/21 from 14/20
1st number: 14/20, 2nd number: 1 9/21
14/20 - 30/21 is -51/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 21 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
14/20 = 14 × 21/20 × 21 = 294/420 - Likewise, for the 2nd fraction, since 21 × 20 = 420,
30/21 = 30 × 20/21 × 20 = 600/420 - Subtract the two like fractions:
294/420 - 600/420 = 294 - 600/420 = -306/420 - After reducing the fraction, the answer is -51/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 28/20-30/21 14/20-60/21 14/40-30/21 14/20-30/42 42/20-30/21 14/20-90/21 14/60-30/21 14/20-30/63 70/20-30/21 98/20-30/21