Subtract 18/12 from 4/45, Solve 4/45

Subtract 18/12 from 4/45

1^st number: 4/45, 2^nd number: 1 6/12

4/45 - 18/12 is -127/90.

Find the least common denominator or LCM of the two denominators:
LCM of 45 and 12 is 180

Next, find the equivalent fraction of both fractional numbers with denominator 180
For the 1st fraction, since 45 × 4 = 180,
4/45 = 4 × 4/45 × 4 = 16/180
Likewise, for the 2nd fraction, since 12 × 15 = 180,
18/12 = 18 × 15/12 × 15 = 270/180
Subtract the two like fractions:
16/180 - 270/180 = 16 - 270/180 = -254/180
After reducing the fraction, the answer is -127/90

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