Subtract 45/25 from 9/20, Solve 9/20

Subtract 45/25 from 9/20

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

9/20 - 45/25 is -27/20.

Find the least common denominator or LCM of the two denominators:
LCM of 20 and 25 is 100

Next, find the equivalent fraction of both fractional numbers with denominator 100
For the 1st fraction, since 20 × 5 = 100,
9/20 = 9 × 5/20 × 5 = 45/100
Likewise, for the 2nd fraction, since 25 × 4 = 100,
45/25 = 45 × 4/25 × 4 = 180/100
Subtract the two like fractions:
45/100 - 180/100 = 45 - 180/100 = -135/100
After reducing the fraction, the answer is -27/20

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