Question

I thought of a number, added 4 5/7 to it, and got the number 12 times as big as my original what was my number

Answer 1

Let's call the number you thought of n. Then what the two steps you took can be written as an equation:
$n+4\frac{5}{7}=12n$

Subtract n to get all of your variables to one side:
$4\frac{5}{7}=11n$

At this point, I recommend turning your mixed number into an improper fraction. It will make things easier later on:
$\frac{33}{7}=11n$

Now divide both sides by 11 to get the value of n:
$\frac{3}{7}=n$

Answer 2

Answer:

3/7

Step-by-step explanation: