The sale price of an item marked x dollars, if 45% is discounted from the market price

x(0.55)

Step-by-step explanation:

Because 45% of the price is being taking, off we are still paying for 55% of the market price, because 100%-45%=55%.

55/100=0.55

So the sale price is x(0.55)

step-by-step explanation:

you can add the two numbers and divide the result by 2. or you can find the gap between the two numbers and add half of this to the smaller number.