Subtract 27/12 from 7/40, Solve 7/40

Subtract 27/12 from 7/40

1^st number: 7/40, 2^nd number: 2 3/12

7/40 - 27/12 is -83/40.

Find the least common denominator or LCM of the two denominators:
LCM of 40 and 12 is 120

Next, find the equivalent fraction of both fractional numbers with denominator 120
For the 1st fraction, since 40 × 3 = 120,
7/40 = 7 × 3/40 × 3 = 21/120
Likewise, for the 2nd fraction, since 12 × 10 = 120,
27/12 = 27 × 10/12 × 10 = 270/120
Subtract the two like fractions:
21/120 - 270/120 = 21 - 270/120 = -249/120
After reducing the fraction, the answer is -83/40

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