Hi everyone,
I finished the 5lb chapter on ratios with pretty much no issues except for this question which I just can’t wrap my head around. I think the relationships between the coins/ different currencies is confusing me but I’m not sure.
I also don’t find it useful to put the currency into “something familiar” like dollars as suggested by the 5lb book solution explanation.
Could anyone explain it to me?
Thank you in advance 
P.S. please ignore my scribblings…
Yeah I remember this problem, those coin names were annoying and confusing me 
My personal strategy is that if I am not able to understand a question in first two readings, I just note down what is given in the question and see where my destiny takes me:) So:
10 terble = 1 galok
6 barbar = 1 murb
Also given, galok = 40% more than murb = 1.4 x murb
But murb = 6 barbar
Thus, galok = 1.4 x 6 barbar …(1)
Also given, 1 galok = 10 terble
Thus we can write equation (1) as 10 terble = 1.4 x 6 barbar
Taking barber to LHS and 10 to RHS we get,
terble/barbar = 1.4 x 6/10 = 14 x 6/100 = 84/100 = 21/25
Thus option (E) 21/25 is the correct answer. Cheers!
(g=galok, t=terble, b=barbar, m=murb)
1g=10t
6b=1m
Now, 1g=1.4m , therefore 10t=14m=8.4b.
so you have to compare 10t to 8.4b. so 1t=0.84b. Use your calculator and look which fraction gives you exactly 0.84. It’s answer E
