sale price = (original price) - (20% of original price) sale price = 160 - (20% of 160) sale price = 160 - (0.2*160) sale price = 160 - 32 sale price = 128
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Method 2
Sale price = 80% of original price Sale price = 0.8*(original price) Sale price = 0.8*(160) Sale price = 128
The discount is 20% so the leftover bit (80%) is the sale price