Subtract 1/21 from 84/2, Solve 42 0/2

Subtract 1/21 from 84/2

1^st number: 42 0/2, 2^nd number: 1/21

84/2 - 1/21 is 881/21.

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,
84/2 = 84 × 21/2 × 21 = 1764/42
Likewise, for the 2nd fraction, since 21 × 2 = 42,
1/21 = 1 × 2/21 × 2 = 2/42
Subtract the two like fractions:
1764/42 - 2/42 = 1764 - 2/42 = 1762/42
After reducing the fraction, the answer is 881/21
In mixed form: 4120/21

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