Xandra Granade 🏳️‍⚧️ on Nostr: Using a calculator, or something like Python's log function*, you can check that ...

Using a calculator, or something like Python's log function*, you can check that log(1 - ¼) ≈ -0.125, and log(1 - ½) ≈ -0.30, so to find out how much power you've lost through both, you can just add -0.125 to -0.3 to get -0.425. To go back to multiplication at the end, 10^-0.425 ≈ 37.6%. Not bad for keeping only two decimal places.

(*Python's log function assumes base 𝑒 by default; make sure to use `math.log(x, 10)` to represent log₁₀.)