Subtract 81/25 from 9/21
1st number: 9/21, 2nd number: 3 6/25
9/21 - 81/25 is -492/175.
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,
9/21 = 9 × 25/21 × 25 = 225/525 - Likewise, for the 2nd fraction, since 25 × 21 = 525,
81/25 = 81 × 21/25 × 21 = 1701/525 - Subtract the two like fractions:
225/525 - 1701/525 = 225 - 1701/525 = -1476/525 - After reducing the fraction, the answer is -492/175
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