Subtract 20/42 from 14/30
14/30 - 20/42 is -1/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
14/30 = 14 × 7/30 × 7 = 98/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
20/42 = 20 × 5/42 × 5 = 100/210 - Subtract the two like fractions:
98/210 - 100/210 = 98 - 100/210 = -2/210 - After reducing the fraction, the answer is -1/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 28/30-20/42 14/30-40/42 14/60-20/42 14/30-20/84 42/30-20/42 14/30-60/42 14/90-20/42 70/30-20/42 98/30-20/42