It says to complete the following ratio tables, but i'm stuck again lol can u : )?

Let x represents for each unknown number in the box

First box

Since there is given 12,60

X / 20 = 12 / 60

x = 4

second box

x / 15 = 12 / 60

x = 3

third box

100 / x = 12 / 60

X = 500 

all it means is function 3