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

Question

how do i do this

Answer 1

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.