Subtract 8/25 from 21/12, Solve 1 9/12

Subtract 8/25 from 21/12

1^st number: 1 9/12, 2^nd number: 8/25

21/12 - 8/25 is 143/100.

Find the least common denominator or LCM of the two denominators:
LCM of 12 and 25 is 300

Next, find the equivalent fraction of both fractional numbers with denominator 300
For the 1st fraction, since 12 × 25 = 300,
21/12 = 21 × 25/12 × 25 = 525/300
Likewise, for the 2nd fraction, since 25 × 12 = 300,
8/25 = 8 × 12/25 × 12 = 96/300
Subtract the two like fractions:
525/300 - 96/300 = 525 - 96/300 = 429/300
After reducing the fraction, the answer is 143/100
In mixed form: 143/100

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