Subtract 42/72 from 30/2, Solve 15 0/2

Subtract 42/72 from 30/2

1^st number: 15 0/2, 2^nd number: 42/72

30/2 - 42/72 is 173/12.

Find the least common denominator or LCM of the two denominators:
LCM of 2 and 72 is 72

Next, find the equivalent fraction of both fractional numbers with denominator 72
For the 1st fraction, since 2 × 36 = 72,
30/2 = 30 × 36/2 × 36 = 1080/72
Likewise, for the 2nd fraction, since 72 × 1 = 72,
42/72 = 42 × 1/72 × 1 = 42/72
Subtract the two like fractions:
1080/72 - 42/72 = 1080 - 42/72 = 1038/72
After reducing the fraction, the answer is 173/12
In mixed form: 145/12

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