A reasonable tip would be $5.00
Rosita paid $27.08 an wants to tip a whole dollar closest to 20%.
The first step is therefore to find out 20% of $27.08.
= 20% x 27.08
= $5.42
The closest whole dollar depends on the first decimal point.
If it is 5 and above, the tip would be $5 as we would round down.
If it is 4 and below, the tip would be $6 as we would round up.
The first decimal is 4 so we would round down to $5.00
The tip would therefore be $5.00
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