Subtract 15/30 from 54/15, Solve 3 9/15

Subtract 15/30 from 54/15

1^st number: 3 9/15, 2^nd number: 15/30

54/15 - 15/30 is 31/10.

Find the least common denominator or LCM of the two denominators:
LCM of 15 and 30 is 30

Next, find the equivalent fraction of both fractional numbers with denominator 30
For the 1st fraction, since 15 × 2 = 30,
54/15 = 54 × 2/15 × 2 = 108/30
Likewise, for the 2nd fraction, since 30 × 1 = 30,
15/30 = 15 × 1/30 × 1 = 15/30
Subtract the two like fractions:
108/30 - 15/30 = 108 - 15/30 = 93/30
After reducing the fraction, the answer is 31/10
In mixed form: 31/10

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