Can someone tell me the correct formula?

Question

JavaScript

I have an object of the form:

[{'name' : 'usd',
'rate' : 61,49},
{'name' : 'eur',
'rate' : 69,8},
{'name' : 'gbp',
'rate' : 95,05},
{'name' : 'chf',
'rate' : 64,43},
{'name' : 'kzt',
'rate' : 0,22}]

That is, the abbreviation of the currency and the exchange rate in relation to the Russian ruble.
If the site selects chf=>kzt , then you need to display the chf to kzt exchange rate based on the data that is in the object. Please tell me the correct formula.

Answer 1

(chf / kzt) = (chf / rub) / (kzt / rub)

Answer 2

Let's figure out the formula. you have chf/rub and kzt/rub. If you divide one by the other - chf/rub * rub/kzt = chf/kzt