Subtract 42/16 from 10/18, Solve 10/18

Subtract 42/16 from 10/18

1^st number: 10/18, 2^nd number: 2 10/16

10/18 - 42/16 is -149/72.

Find the least common denominator or LCM of the two denominators:
LCM of 18 and 16 is 144

Next, find the equivalent fraction of both fractional numbers with denominator 144
For the 1st fraction, since 18 × 8 = 144,
10/18 = 10 × 8/18 × 8 = 80/144
Likewise, for the 2nd fraction, since 16 × 9 = 144,
42/16 = 42 × 9/16 × 9 = 378/144
Subtract the two like fractions:
80/144 - 378/144 = 80 - 378/144 = -298/144
After reducing the fraction, the answer is -149/72

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