Subtract 8/6 from 30/70, Solve 30/70

Subtract 8/6 from 30/70

1^st number: 30/70, 2^nd number: 1 2/6

30/70 - 8/6 is -19/21.

Find the least common denominator or LCM of the two denominators:
LCM of 70 and 6 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 70 × 3 = 210,
30/70 = 30 × 3/70 × 3 = 90/210
Likewise, for the 2nd fraction, since 6 × 35 = 210,
8/6 = 8 × 35/6 × 35 = 280/210
Subtract the two like fractions:
90/210 - 280/210 = 90 - 280/210 = -190/210
After reducing the fraction, the answer is -19/21

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