Subtract 90/4 from 27/45, Solve 27/45

Subtract 90/4 from 27/45

1^st number: 27/45, 2^nd number: 22 2/4

27/45 - 90/4 is -219/10.

Find the least common denominator or LCM of the two denominators:
LCM of 45 and 4 is 180

Next, find the equivalent fraction of both fractional numbers with denominator 180
For the 1st fraction, since 45 × 4 = 180,
27/45 = 27 × 4/45 × 4 = 108/180
Likewise, for the 2nd fraction, since 4 × 45 = 180,
90/4 = 90 × 45/4 × 45 = 4050/180
Subtract the two like fractions:
108/180 - 4050/180 = 108 - 4050/180 = -3942/180
After reducing the fraction, the answer is -219/10

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