Subtract 24/30 from 27/42
27/42 - 24/30 is -11/70.
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,
27/42 = 27 × 5/42 × 5 = 135/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
24/30 = 24 × 7/30 × 7 = 168/210 - Subtract the two like fractions:
135/210 - 168/210 = 135 - 168/210 = -33/210 - After reducing the fraction, the answer is -11/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/42-24/30 27/42-48/30 27/84-24/30 27/42-24/60 81/42-24/30 27/42-72/30 27/42-24/90