Question 1061396

In one month Karina earned $600 at her part-time job, and $90 was withheld for federal income tax. Suppose she earns $900 next month. How much will be withheld for federal income tax?
<pre>With F being the federal withholdings on $900, we get the following PROPORTION: {{{600/900 = 90/F}}}
{{{2/3 = 90/F}}} -------- Reducing {{{600/900}}}
2F = 3(90) ------ Cross-multiplying
F, or federal withholdings on $900 = {{{highlight_green(matrix(1,3, 3(90)/2, or, "$135"))}}}