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

Subtract 12/21 from 9/25

9/25 - 12/21 is -37/175.

Find the least common denominator or LCM of the two denominators:
LCM of 25 and 21 is 525

Next, find the equivalent fraction of both fractional numbers with denominator 525
For the 1st fraction, since 25 × 21 = 525,
9/25 = 9 × 21/25 × 21 = 189/525
Likewise, for the 2nd fraction, since 21 × 25 = 525,
12/21 = 12 × 25/21 × 25 = 300/525
Subtract the two like fractions:
189/525 - 300/525 = 189 - 300/525 = -111/525
After reducing the fraction, the answer is -37/175

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