Subtract 5/70 from 27/18, Solve 1 9/18

Subtract 5/70 from 27/18

1^st number: 1 9/18, 2^nd number: 5/70

27/18 - 5/70 is 10/7.

Find the least common denominator or LCM of the two denominators:
LCM of 18 and 70 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 18 × 35 = 630,
27/18 = 27 × 35/18 × 35 = 945/630
Likewise, for the 2nd fraction, since 70 × 9 = 630,
5/70 = 5 × 9/70 × 9 = 45/630
Subtract the two like fractions:
945/630 - 45/630 = 945 - 45/630 = 900/630
After reducing the fraction, the answer is 10/7
In mixed form: 13/7

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