Subtract 21/50 from 12/54, Solve 12/54

Subtract 21/50 from 12/54

12/54 - 21/50 is -89/450.

Find the least common denominator or LCM of the two denominators:
LCM of 54 and 50 is 1350

Next, find the equivalent fraction of both fractional numbers with denominator 1350
For the 1st fraction, since 54 × 25 = 1350,
12/54 = 12 × 25/54 × 25 = 300/1350
Likewise, for the 2nd fraction, since 50 × 27 = 1350,
21/50 = 21 × 27/50 × 27 = 567/1350
Subtract the two like fractions:
300/1350 - 567/1350 = 300 - 567/1350 = -267/1350
After reducing the fraction, the answer is -89/450

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