Question

$1799.91 with 6% tax added

Answer 1

To find tax : $1,799.91 x 1.06 = $1907.9046. Because it's money, it should be rounded to $1907.90.

Of course, another way to do it is by multiplying $1,799.91 by 0.06, and adding the product that you get to 1,799.91.

Either way, you will still get $1907.9046

Answer 2

1799.91 with 6%

First lets make 6% into a decimal

6% divided by 100 = 0.06 
6% = 0.06 

Now lets multiply 

1799.91 x 0.06 =   107.9946

Now lets add 

107.9946 + 1799.91 = 1,907.9046

The final answer is 1,907.9046