Subtract 27/3 from 30/70, Solve 30/70

Subtract 27/3 from 30/70

1^st number: 30/70, 2^nd number: 9 0/3

30/70 - 27/3 is -60/7.

Find the least common denominator or LCM of the two denominators:
LCM of 70 and 3 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 3 × 70 = 210,
27/3 = 27 × 70/3 × 70 = 1890/210
Subtract the two like fractions:
90/210 - 1890/210 = 90 - 1890/210 = -1800/210
After reducing the fraction, the answer is -60/7

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