Subtract 40/35 from 3/12, Solve 3/12

Subtract 40/35 from 3/12

1^st number: 3/12, 2^nd number: 1 5/35

3/12 - 40/35 is -25/28.

Find the least common denominator or LCM of the two denominators:
LCM of 12 and 35 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 12 × 35 = 420,
3/12 = 3 × 35/12 × 35 = 105/420
Likewise, for the 2nd fraction, since 35 × 12 = 420,
40/35 = 40 × 12/35 × 12 = 480/420
Subtract the two like fractions:
105/420 - 480/420 = 105 - 480/420 = -375/420
After reducing the fraction, the answer is -25/28

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