Suppose you go to a store and see two $100 suits for SALE.  One suit has 30% off and with an additional 20% OFF the discounted price.  The other is marked 50% off.  Which suit is cheaper

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First suit: 30% of $100 = 100/100 x 30 = $30 Initial reduction = $100 - $30 = $70 20% of $70 = 70/100 x 20 = $14 Secondary reduction = $70 - $14 = $56     Second suit: 50% of $100 = 100/100 x 50 = $50 Reduction = $100 - $50 = $50     The suit marked 50% off is therefore cheaper by $6.