Answer:
129.3% of cost
Explanation:
cost + markup = selling price
$78.50 + markup = $179.99 . . . . fill in given information
markup = $101.49
The markup as a percentage of cost is ...
markup/cost × 100% = $101.49/%78.50 × 100% ≈ 129.3%
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As a percentage of selling price, the markup is ...
markup/selling price × 100% = $101.49/$179.99 × 100% ≈ 56.4%