Answers

Subtract 35/81 from 28/70

28/70 - 35/81 is -13/405.

Steps for subtracting fractions

1. 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
2. For the 1st fraction, since 70 × 81 = 5670,
   28/70 = 28 × 81/70 × 81 = 2268/5670
3. Likewise, for the 2nd fraction, since 81 × 70 = 5670,
   35/81 = 35 × 70/81 × 70 = 2450/5670
4. Subtract the two like fractions:
   2268/5670 - 2450/5670 = 2268 - 2450/5670 = -182/5670
5. After reducing the fraction, the answer is -13/405

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