Subtract 16/25 from 12/21
12/21 - 16/25 is -12/175.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 25 is 525
Next, find the equivalent fraction of both fractional numbers with denominator 525 - For the 1st fraction, since 21 × 25 = 525,
12/21 = 12 × 25/21 × 25 = 300/525 - Likewise, for the 2nd fraction, since 25 × 21 = 525,
16/25 = 16 × 21/25 × 21 = 336/525 - Subtract the two like fractions:
300/525 - 336/525 = 300 - 336/525 = -36/525 - After reducing the fraction, the answer is -12/175
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