Subtract 12/25 from 21/48, Solve 21/48

Subtract 12/25 from 21/48

21/48 - 12/25 is -17/400.

Find the least common denominator or LCM of the two denominators:
LCM of 48 and 25 is 1200

Next, find the equivalent fraction of both fractional numbers with denominator 1200
For the 1st fraction, since 48 × 25 = 1200,
21/48 = 21 × 25/48 × 25 = 525/1200
Likewise, for the 2nd fraction, since 25 × 48 = 1200,
12/25 = 12 × 48/25 × 48 = 576/1200
Subtract the two like fractions:
525/1200 - 576/1200 = 525 - 576/1200 = -51/1200
After reducing the fraction, the answer is -17/400

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