Subtract 30/20 from 5/45, Solve 5/45

Subtract 30/20 from 5/45

1^st number: 5/45, 2^nd number: 1 10/20

5/45 - 30/20 is -25/18.

Find the least common denominator or LCM of the two denominators:
LCM of 45 and 20 is 180

Next, find the equivalent fraction of both fractional numbers with denominator 180
For the 1st fraction, since 45 × 4 = 180,
5/45 = 5 × 4/45 × 4 = 20/180
Likewise, for the 2nd fraction, since 20 × 9 = 180,
30/20 = 30 × 9/20 × 9 = 270/180
Subtract the two like fractions:
20/180 - 270/180 = 20 - 270/180 = -250/180
After reducing the fraction, the answer is -25/18

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