Subtract 42/40 from 8/27, Solve 8/27

Subtract 42/40 from 8/27

1^st number: 8/27, 2^nd number: 1 2/40

8/27 - 42/40 is -407/540.

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,
8/27 = 8 × 40/27 × 40 = 320/1080
Likewise, for the 2nd fraction, since 40 × 27 = 1080,
42/40 = 42 × 27/40 × 27 = 1134/1080
Subtract the two like fractions:
320/1080 - 1134/1080 = 320 - 1134/1080 = -814/1080
After reducing the fraction, the answer is -407/540

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