Subtract 42/18 from 21/6
1st number: 3 3/6, 2nd number: 2 6/18
21/6 - 42/18 is 7/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 18 is 18
Next, find the equivalent fraction of both fractional numbers with denominator 18 - For the 1st fraction, since 6 × 3 = 18,
21/6 = 21 × 3/6 × 3 = 63/18 - Likewise, for the 2nd fraction, since 18 × 1 = 18,
42/18 = 42 × 1/18 × 1 = 42/18 - Subtract the two like fractions:
63/18 - 42/18 = 63 - 42/18 = 21/18 - After reducing the fraction, the answer is 7/6
- In mixed form: 11/6
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