Subtract 96/45 from 21/12, Solve 1 9/12

Subtract 96/45 from 21/12

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

21/12 - 96/45 is -23/60.

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

Next, find the equivalent fraction of both fractional numbers with denominator 180
For the 1st fraction, since 12 × 15 = 180,
21/12 = 21 × 15/12 × 15 = 315/180
Likewise, for the 2nd fraction, since 45 × 4 = 180,
96/45 = 96 × 4/45 × 4 = 384/180
Subtract the two like fractions:
315/180 - 384/180 = 315 - 384/180 = -69/180
After reducing the fraction, the answer is -23/60

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