Subtract 90/40 from 3/27, Solve 3/27

Subtract 90/40 from 3/27

1^st number: 3/27, 2^nd number: 2 10/40

3/27 - 90/40 is -77/36.

Find the least common denominator or LCM of the two denominators:
LCM of 27 and 40 is 1080

Next, find the equivalent fraction of both fractional numbers with denominator 1080
For the 1st fraction, since 27 × 40 = 1080,
3/27 = 3 × 40/27 × 40 = 120/1080
Likewise, for the 2nd fraction, since 40 × 27 = 1080,
90/40 = 90 × 27/40 × 27 = 2430/1080
Subtract the two like fractions:
120/1080 - 2430/1080 = 120 - 2430/1080 = -2310/1080
After reducing the fraction, the answer is -77/36

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