question that entails conversion of margin to markup and markup to margin using

Mark up is on top of cost So if cost is $450 and mark up 5% 1 + Mark up that means $450 * 1.05 = the selling price is $472.50 Margin of 5% If the cost is $450 / 1 - Margin Whilst 1 - Margin= 1 - 0.05 So 450/ 0.95 = $473.68