Subtract 21/9 from 30/2, Solve 15 0/2

Subtract 21/9 from 30/2

1^st number: 15 0/2, 2^nd number: 2 3/9

30/2 - 21/9 is 38/3.

Find the least common denominator or LCM of the two denominators:
LCM of 2 and 9 is 18

Next, find the equivalent fraction of both fractional numbers with denominator 18
For the 1st fraction, since 2 × 9 = 18,
30/2 = 30 × 9/2 × 9 = 270/18
Likewise, for the 2nd fraction, since 9 × 2 = 18,
21/9 = 21 × 2/9 × 2 = 42/18
Subtract the two like fractions:
270/18 - 42/18 = 270 - 42/18 = 228/18
After reducing the fraction, the answer is 38/3
In mixed form: 122/3

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