Mathematics for IGCSE & O level - Using A Calculator (Section 4 - No. 7)
If you wanted to enter a time of 2 hours 30 minutes into your calculator and the calculator display uses a decimal format, what would you enter?
2.30
2.5
2:30
230
Тайлбар
30 minutes is half an hour, therefore it would be entered as 0.5.