Answer:
$360
Explanation:
there are multiple ways to work this oout, but the easiest is to find 10% of 400, and subtract it from 400.
to find the 10%, you can convert 10% into a decimal, which is 0.1.
you can then use a calculator to multiply 400 by 0.1, giving you 40.
400 - 40 = 360.
or, you can divide 400 by 100 and multiply it by 10, giving you 40.
your answer is $360.