Percentages 1: a percentage of a number
2nd F then 1 is the percentage function, and it ends the calculation itself: do not press equals. What is 20% of 5000? Type 5000, press 
, type 20, then press 
and 
: 1'000..
2nd F then 1 is the percentage function, and it ends the calculation itself: do not press equals. What is 20% of 5000? Type 5000, press , type 20, then press and : 1'000..