Subtract 45/25 from 9/21, Solve 9/21

Subtract 45/25 from 9/21

1^st number: 9/21, 2^nd number: 1 20/25

9/21 - 45/25 is -48/35.

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,
45/25 = 45 × 21/25 × 21 = 945/525
Subtract the two like fractions:
225/525 - 945/525 = 225 - 945/525 = -720/525
After reducing the fraction, the answer is -48/35

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