Subtract 45/25 from 12/21
1st number: 12/21, 2nd number: 1 20/25
12/21 - 45/25 is -43/35.
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,
45/25 = 45 × 21/25 × 21 = 945/525 - Subtract the two like fractions:
300/525 - 945/525 = 300 - 945/525 = -645/525 - After reducing the fraction, the answer is -43/35
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