Subtract 15/81 from 3/70, Solve 3/70

Subtract 15/81 from 3/70

3/70 - 15/81 is -269/1890.

Find the least common denominator or LCM of the two denominators:
LCM of 70 and 81 is 5670

Next, find the equivalent fraction of both fractional numbers with denominator 5670
For the 1st fraction, since 70 × 81 = 5670,
3/70 = 3 × 81/70 × 81 = 243/5670
Likewise, for the 2nd fraction, since 81 × 70 = 5670,
15/81 = 15 × 70/81 × 70 = 1050/5670
Subtract the two like fractions:
243/5670 - 1050/5670 = 243 - 1050/5670 = -807/5670
After reducing the fraction, the answer is -269/1890

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