Subtract 70/40 from 12/27, Solve 12/27

Subtract 70/40 from 12/27

1^st number: 12/27, 2^nd number: 1 30/40

12/27 - 70/40 is -47/36.

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,
12/27 = 12 × 40/27 × 40 = 480/1080
Likewise, for the 2nd fraction, since 40 × 27 = 1080,
70/40 = 70 × 27/40 × 27 = 1890/1080
Subtract the two like fractions:
480/1080 - 1890/1080 = 480 - 1890/1080 = -1410/1080
After reducing the fraction, the answer is -47/36

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