<PRE><B>Question 980096</B>
(3/5) in soap and (5/9) in soap.  Concentration of soap as fractions.


10 kg of the first washing powder mixed with 18 kg of the second washing powder:
28 kg of washing power;
{{{10(3/5)+18(5/9)}}} kilograms of soap;
{{{6+10}}}
{{{16}}}--------kilograms of soap.



Summarizing the results calculated,
28 kg of washing powder
16 kg of soap
-
Amount of &quot;soda&quot;, {{{28-16=12}}}.


RATIO OF SODA to SOAP
12:16,
3:4--------------------YOUR ANSWER</PRE>