Subtract 35/27 from 15/70, Solve 15/70

Subtract 35/27 from 15/70

1^st number: 15/70, 2^nd number: 1 8/27

15/70 - 35/27 is -409/378.

Find the least common denominator or LCM of the two denominators:
LCM of 70 and 27 is 1890

Next, find the equivalent fraction of both fractional numbers with denominator 1890
For the 1st fraction, since 70 × 27 = 1890,
15/70 = 15 × 27/70 × 27 = 405/1890
Likewise, for the 2nd fraction, since 27 × 70 = 1890,
35/27 = 35 × 70/27 × 70 = 2450/1890
Subtract the two like fractions:
405/1890 - 2450/1890 = 405 - 2450/1890 = -2045/1890
After reducing the fraction, the answer is -409/378

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