Subtract 42/16 from 30/54, Solve 30/54

Subtract 42/16 from 30/54

1^st number: 30/54, 2^nd number: 2 10/16

30/54 - 42/16 is -149/72.

Find the least common denominator or LCM of the two denominators:
LCM of 54 and 16 is 432

Next, find the equivalent fraction of both fractional numbers with denominator 432
For the 1st fraction, since 54 × 8 = 432,
30/54 = 30 × 8/54 × 8 = 240/432
Likewise, for the 2nd fraction, since 16 × 27 = 432,
42/16 = 42 × 27/16 × 27 = 1134/432
Subtract the two like fractions:
240/432 - 1134/432 = 240 - 1134/432 = -894/432
After reducing the fraction, the answer is -149/72

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