Como converter números decimais ou fracionados em inteiros no HP30b?

[ijabbott]

One way to do it manually is to pretend that 1.8% is an annual rate compounded yearly for 6 years, then determine the interest rate that would produce the same future value in 4 years:

Code:

1 SHIFT P/YR
6 N
1.8 I/YR 
1 PV
0 PMT
FV            [FV = -1.11297822601]
4 N
I/YR          [I/YR = 2.71211379381]