Sales price before discount = x
Discount= 0.2 x
Sales price after discount = 0.8 x
"If 0.8 x = 175 then x = \\frac {175}{0.8} = 218.75"
Sales price before discount = 218.75
"Discount = 0.2 \\times 218.75 = 43.75"
Discount amount= R 43.75
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