Subtract 1/6 from 18/21
18/21 - 1/6 is 29/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 6 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
18/21 = 18 × 2/21 × 2 = 36/42 - Likewise, for the 2nd fraction, since 6 × 7 = 42,
1/6 = 1 × 7/6 × 7 = 7/42 - Subtract the two like fractions:
36/42 - 7/42 = 36 - 7/42 = 29/42
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