Nick's resturant bill totaled $64.20. SHOW HOW TO ESTIMATE 15% OF THE TIP. Show and explain each step.

Question

Nick's resturant bill totaled $64.20.   SHOW HOW TO ESTIMATE 15% OF THE TIP.  Show and explain each step.

cathyangs · Answer

Well, 15% is also 10% +5% 

10% of something is just the decimal moved once to the left, so 6.42. We can round this to 6.50

5% is 1/2 of the 10% (which was about 6.50, remember?) so it's 3.25

6.50+3.25 is a $9.75 tip

anonymous · Answer

or not round it and get 
6.42 +3.21

anonymous · Answer

Thank you two! But, it's asking to estimate the tip.  Do I just leave it the way it is or is there a certain way to complete the question with estimating and rounding it?

anonymous · Answer

rounding is the same as estimating

anonymous · Answer

Right...

cathyangs · Answer

I'd leave it the way it is, unless it specifies for you to round to a certain place value.

anonymous · Answer

Thank you. :)