Subtract 8/84 from 15/2, Solve 7 1/2

Subtract 8/84 from 15/2

1^st number: 7 1/2, 2^nd number: 8/84

15/2 - 8/84 is 311/42.

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,
15/2 = 15 × 42/2 × 42 = 630/84
Likewise, for the 2nd fraction, since 84 × 1 = 84,
8/84 = 8 × 1/84 × 1 = 8/84
Subtract the two like fractions:
630/84 - 8/84 = 630 - 8/84 = 622/84
After reducing the fraction, the answer is 311/42
In mixed form: 717/42

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