Subtract 1/42 from 27/72
27/72 - 1/42 is 59/168.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 42 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 72 × 7 = 504,
27/72 = 27 × 7/72 × 7 = 189/504 - Likewise, for the 2nd fraction, since 42 × 12 = 504,
1/42 = 1 × 12/42 × 12 = 12/504 - Subtract the two like fractions:
189/504 - 12/504 = 189 - 12/504 = 177/504 - After reducing the fraction, the answer is 59/168
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/72-1/42 27/72-2/42 27/72-1/84 81/72-1/42 27/72-3/42 27/72-5/42 27/72-7/42