Subtract 18/21 from 20/2
1st number: 10 0/2, 2nd number: 18/21
20/2 - 18/21 is 64/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 2 × 21 = 42,
20/2 = 20 × 21/2 × 21 = 420/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
18/21 = 18 × 2/21 × 2 = 36/42 - Subtract the two like fractions:
420/42 - 36/42 = 420 - 36/42 = 384/42 - After reducing the fraction, the answer is 64/7
- In mixed form: 91/7
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