Subtract 8/12 from 45/70, Solve 45/70

Subtract 8/12 from 45/70

45/70 - 8/12 is -1/42.

Find the least common denominator or LCM of the two denominators:
LCM of 70 and 12 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 70 × 6 = 420,
45/70 = 45 × 6/70 × 6 = 270/420
Likewise, for the 2nd fraction, since 12 × 35 = 420,
8/12 = 8 × 35/12 × 35 = 280/420
Subtract the two like fractions:
270/420 - 280/420 = 270 - 280/420 = -10/420
After reducing the fraction, the answer is -1/42

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