Subtract 27/4 from 7/70, Solve 7/70

Subtract 27/4 from 7/70

1^st number: 7/70, 2^nd number: 6 3/4

7/70 - 27/4 is -133/20.

Find the least common denominator or LCM of the two denominators:
LCM of 70 and 4 is 140

Next, find the equivalent fraction of both fractional numbers with denominator 140
For the 1st fraction, since 70 × 2 = 140,
7/70 = 7 × 2/70 × 2 = 14/140
Likewise, for the 2nd fraction, since 4 × 35 = 140,
27/4 = 27 × 35/4 × 35 = 945/140
Subtract the two like fractions:
14/140 - 945/140 = 14 - 945/140 = -931/140
After reducing the fraction, the answer is -133/20

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