Altp Written Question (navigation)

[giladal]

Hi.
I am studying for the ATPL written and I came to a little issue with the calculations of CH Lat and D Lat.

I know you have to mulitply it by 60, but how do you go and multiply a coordinate such as 24°23'. 24 x 60 is 1440 I am not understanding how to get the answer for the 23'.

Any ideas?

Not looking for the answer, just the method.

Thanks