I think you just got confused with the term "dollars to quilos".While touring through Europe, alfred finds that $1 is equal to 7 Drachmas, and that 5 drachmas is equal to 3 quilos. What is the ratio of dollars to quilos?
Answer is 21/5, but my calculation is 5/21
is this wrong answer for destroyer or me
When I worked it out, I got the same answer as the OP but I realize this is incorrect. I'm assuming they fell into the same mistake I did. I worked out the stoichiometry problem like you did.You can do this also by just setting up this:
1$ x 1/7 drachma x 5 drachma/3 quilos then you just multiply and divide and you are left with 5$/21quilos which is the ratio you want. It's pretty much the same way you can do stoichiometry problems if that helps.
I think what you need to do is take it one step further. You have the ratio of $5/21Q. This is the same as 5$:21Q. Now, you want the ratio of 1 dollar to x drachmas, so you divide each side by 5. This gives you 1$:21/5 drachmas. Does that clear it up?+1 Thank you guys. Now I understand the way for solving this problem, but still don't understand why my calculation has different answer, logically it should be same. I used the chemistry stoichimetrical way as follows.
($1/7d ) x (5D/3Q) D cancel out and what we have left is $5/21Q which means $5 to 21Q ratio.