Motoko division while maintaining precision

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1

What’s the best way to divide two Integers and maintain precision in Motoko, for example to divide two numbers with digits in the trillions.

In my specific case I want to get the percent adjustment from one number to the second number actual_value / expected_value, with 1e12 precision.

Would it be to:

  1. Scale the numerator by 1e12 numerator * 1e12
  2. Do the Integer division scaled numerator / divisor
  3. Convert the Integer to a Float
  4. Divide the Float result by 1e12.

Ideally this needs to be done on the backend.

1 Like
2

I always multiply by a Big Ass™️ 10^n number and then divide it back out at the end. I brought this over from my solidity days.