I'm doing binomial distribution with success andfailure.For instance I get 405\65536 with the resul

Question

I'm sure there is a way to calculator large proper fraction,just insure how to do it exactly without getting X 10 exponent.

Answer 1

I don't know what kind of calculator you have.  Mine has 2 ENG keys (ENG stands for Engineering units) above the multiplication and division keys.  So if I enter 405/65536 I will get 

 

6.17980957E-03 

 

If I then press the SHIFT key and ENG (left) above the multiplication key I will get 

 

0.006179809E0 

 

which I think is what you are looking for.  By the way, these keys are called Engineering units because they move the X 10 exponent to different multiples of 3, which is nice for converting things from meters to kilometers and millimeters and so forth.  

 

If you don't have a key like that on your calculator you can try this little trick.  When you get a result like 

 

6.17980957E-03 

 

on your calculator, multiply by 10 raised to a power of one less than the absolute value of the exponent (in this case that would be 10 squared = 100) to get a number with no exponent, in this case 

 

0.617980957 

 

Of course then when you write that number down you have to remember to put the 2 leading zeroes back in to get 

 

0.00617980957