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explain how to estimate a 15% tip on a $29.95 restauraunt

how do i do this
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1 Answer

You can begin by rounding $29.95 to $30.
Break up 15% into 10% + 5%.
Find 10% of 30, which is $3.
5% is half of 10%. Since 10% was $3, 5% must be $1.50.
Add 3 + 1.5 for a total of $4.50.