Im aware that you can find the current passing through each resistor in a parallel circuit by using the equation I=v/r but for homework i was asked how to find the current by using the ratios between each resistor.
---5ohms---- Resistor 1
- 20ohm - Resistor 2
- 10ohms - Resistor 3
----| - |-----
If only resistor 1 and 2 exists i can do it by dividing 5 by 5+20 and dividing
20 by 2+20. Inverting the results so 5/25 is for resistor 2 and vice versa then multiplying the results by 20amps. This gives the amps passing through each resistor.
I've no idea how to do it if there is 3 or more resistors.