Subtract 1/42 from 27/40
27/40 - 1/42 is 547/840.
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,
1/42 = 1 × 20/42 × 20 = 20/840 - Subtract the two like fractions:
567/840 - 20/840 = 567 - 20/840 = 547/840
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