Subtract 18/30 from 14/42
14/42 - 18/30 is -4/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
14/42 = 14 × 5/42 × 5 = 70/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
18/30 = 18 × 7/30 × 7 = 126/210 - Subtract the two like fractions:
70/210 - 126/210 = 70 - 126/210 = -56/210 - After reducing the fraction, the answer is -4/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 28/42-18/30 14/42-36/30 14/84-18/30 14/42-18/60 14/42-54/30 14/42-18/90 70/42-18/30 14/42-90/30 98/42-18/30