Aspark plug listed at $1.89, marked down 29%

$1.34

Step-by-step explanation:

The price of a spark plug = $1.89

It was marked down = 29%

29 percent of 1.89 = 29% × 1.89

                              =

                              = 0.29 × 1.89

                              = 0.5481 ≈ $0.55

The new price of spark plug = 1.89 - 0.55

                                               = $1.34

The new price after 29% marked down is $1.34.

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step-by-step explanation: