Issue finding change in voltage across a resistor

[Blakeasd]

Homework Statement

Determine the voltage drop across R₁
R1 = 770 , R2 = 630 , and R3 = 470 .
The equivalent resistance is 816Ω

Homework Equations

V = IR

The Attempt at a Solution

1.) I find the total current of the circuit:

V = IR -> I = V/R
I = 12v/816Ω = 0.015A

2.) I then find the voltage drop across that particular resistor:

V = IR
V = 0.015A * 770Ω
V = 11.32v

This has been confirmed to be the wrong answer.

I don't understand what I am doing incorrectly.

Could someone please help me understand my mistake (where ever it may be)?

Many Thanks!

 

[phinds]

You need to draw the circuit with all of the voltages and currents labeled so that you can see clearly what is going on. Thinking that the 15ma all goes through R1 is incorrect.