Subtract 5/42 from 27/40
27/40 - 5/42 is 467/840.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 42 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 40 × 21 = 840,
27/40 = 27 × 21/40 × 21 = 567/840 - Likewise, for the 2nd fraction, since 42 × 20 = 840,
5/42 = 5 × 20/42 × 20 = 100/840 - Subtract the two like fractions:
567/840 - 100/840 = 567 - 100/840 = 467/840
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/40-5/42 27/40-10/42 27/80-5/42 27/40-5/84 81/40-5/42 27/40-15/42 27/40-25/42 27/40-35/42