Subtract 30/27 from 20/45, Solve 20/45

Subtract 30/27 from 20/45

1^st number: 20/45, 2^nd number: 1 3/27

20/45 - 30/27 is -2/3.

Find the least common denominator or LCM of the two denominators:
LCM of 45 and 27 is 135

Next, find the equivalent fraction of both fractional numbers with denominator 135
For the 1st fraction, since 45 × 3 = 135,
20/45 = 20 × 3/45 × 3 = 60/135
Likewise, for the 2nd fraction, since 27 × 5 = 135,
30/27 = 30 × 5/27 × 5 = 150/135
Subtract the two like fractions:
60/135 - 150/135 = 60 - 150/135 = -90/135
After reducing the fraction, the answer is -2/3

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