The numbers you use are 
13.5 +13.5 +3 = 30 
This is allowed because you can use any number and you can also repeat and in Brazil they right their decimals as 13,5 but in America it’s 13.5
        
             
        
        
        
Answer:
2/9
Step-by-step explanation:
B
HOPE IT HELPS HAVE A GREAT DAY
 
        
                    
             
        
        
        
Using the lines that you have both read and white values:
 Divide the red by the white:
16 / 10 = 1.6
40 / 25 = 1.6
The scale factor is 1.6.
So you have 1.6 L red paint / L white paint
 Now multiply the amount of white paint by 1.6 to find the amount of red paint:
4 x 1.6 = 6.4
13 x 1.6 = 20.8
20 x 1.6 = 32