What is 30% of $40 is

  $12

Step-by-step explanation:

"Of" means "times" in this context:

  30% × $40 = 30/100 × $40 = $12

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% is a fancy way to write /100, so 30% = 30/100 = 0.30 (thirty hundredths).

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Since you're familiar with decimal multiplication, you know that you can rewrite this problem as ...

   30/100 × $40

   = 3/10 × $40

   = 3 × ($40/10)

   = 3 × $4

   = $12

answer: 43/157

this is the answer and if you try to prove me wrong your a meanie

47 - 90 = 43

43 - 180 = x

x = 137