Subtract 30/12 from 18/35, Solve 18/35

Subtract 30/12 from 18/35

1^st number: 18/35, 2^nd number: 2 6/12

18/35 - 30/12 is -139/70.

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

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 35 × 12 = 420,
18/35 = 18 × 12/35 × 12 = 216/420
Likewise, for the 2nd fraction, since 12 × 35 = 420,
30/12 = 30 × 35/12 × 35 = 1050/420
Subtract the two like fractions:
216/420 - 1050/420 = 216 - 1050/420 = -834/420
After reducing the fraction, the answer is -139/70

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