Subtract 27/30 from 1/42
1/42 - 27/30 is -92/105.
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,
1/42 = 1 × 5/42 × 5 = 5/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
27/30 = 27 × 7/30 × 7 = 189/210 - Subtract the two like fractions:
5/210 - 189/210 = 5 - 189/210 = -184/210 - After reducing the fraction, the answer is -92/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/42-27/30 1/42-54/30 1/84-27/30 1/42-27/60 3/42-27/30 1/42-81/30 1/42-27/90 5/42-27/30 7/42-27/30