A lunch check is $27.95. How do you estimate a 15% tip?

2 Answers
Nov 19, 2016

4 or 5 dollars depending on the service

Explanation:

10%of 30 =3 so 15%=4.5
When estimating round off numbers to 1 significant figures so calculations are easy!!

Nov 19, 2016

As an estimate, either $4.20 " or " $4.50 would be close to 15% as a tip.

Explanation:

10% is pretty simple to calculate because it just involves moving the comm one place to the left.

5% is half of 10%

$27.95 is close to $28, and for an estimate, close to $30

10% of $28 = $2.80" and "10% of $30 = 3
5% " of " $28 = $1.40" and "5% " of "$30 = $1.50

15% " of " $28 = $4.20" and " 15% " of " $30 = $4.50

As an estimate, either $4.20 " or " $4.50 would be close to 15% as a tip.