Subtract 18/12 from 90/2, Solve 45 0/2

Subtract 18/12 from 90/2

1^st number: 45 0/2, 2^nd number: 1 6/12

90/2 - 18/12 is 87/2.

Find the least common denominator or LCM of the two denominators:
LCM of 2 and 12 is 12

Next, find the equivalent fraction of both fractional numbers with denominator 12
For the 1st fraction, since 2 × 6 = 12,
90/2 = 90 × 6/2 × 6 = 540/12
Likewise, for the 2nd fraction, since 12 × 1 = 12,
18/12 = 18 × 1/12 × 1 = 18/12
Subtract the two like fractions:
540/12 - 18/12 = 540 - 18/12 = 522/12
After reducing the fraction, the answer is 87/2
In mixed form: 431/2

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