Subtract 30/12 from 9/45, Solve 9/45

Subtract 30/12 from 9/45

1^st number: 9/45, 2^nd number: 2 6/12

9/45 - 30/12 is -23/10.

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,
9/45 = 9 × 4/45 × 4 = 36/180
Likewise, for the 2nd fraction, since 12 × 15 = 180,
30/12 = 30 × 15/12 × 15 = 450/180
Subtract the two like fractions:
36/180 - 450/180 = 36 - 450/180 = -414/180
After reducing the fraction, the answer is -23/10

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