Subtract 42/84 from 90/2, Solve 45 0/2

Subtract 42/84 from 90/2

1^st number: 45 0/2, 2^nd number: 42/84

90/2 - 42/84 is 89/2.

Find the least common denominator or LCM of the two denominators:
LCM of 2 and 84 is 84

Next, find the equivalent fraction of both fractional numbers with denominator 84
For the 1st fraction, since 2 × 42 = 84,
90/2 = 90 × 42/2 × 42 = 3780/84
Likewise, for the 2nd fraction, since 84 × 1 = 84,
42/84 = 42 × 1/84 × 1 = 42/84
Subtract the two like fractions:
3780/84 - 42/84 = 3780 - 42/84 = 3738/84
After reducing the fraction, the answer is 89/2
In mixed form: 441/2

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