Nathan needs to pay the restaurant bill. The total is $21.34. Nathan wants to tip 15%. He has to do this in his head! Try to do this in your head, too. First figure out 10%. Then think what half of that is. Add them together for about 15%. It's okay if you aren't exact. How much will the tip be?

Answer 1

To figure out 10% of $21.34, we move the decimal point one place to the left, making it $2.134.

To find half of $2.134, we divide it by 2, resulting in $1.067.

Adding $2.134 and $1.067 together gives us about $3.20.

Therefore, the tip will be approximately $3.20.