Discount and Markup — Mains Strategy

Mains Strategy

This section offers written quantitative reasoning practice; it is not a descriptive CSAT paper. Begin with a labelled price chain from cost to marked price to selling price. State the denominator for each percentage so that the reader can distinguish markup, discount and profit without inferring your convention.

Show each transformation as a multiplier. If working backwards, explain why division by the factor restores the earlier amount. For successive discounts, calculate the retained fraction first and subtract it from one to obtain the equivalent discount. When comparing profit percentage with margin, keep the monetary profit fixed and change only the stated denominator.

Conclude with the requested value and a substitution check. For example, a recovered marked price should reproduce the supplied selling price when the discount is applied. Discuss rounding only if it affects the answer at the precision requested. This structure makes the common errors visible: changing the percentage base, adding sequential rates or reporting a correct calculation for the wrong commercial quantity.