What single discount is equivalent to two successive discount of 25% and 5% ?
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5.D=x+y-x×y/100
=25+5-25×5÷100
=25+5-5/4
=120-5/4
=115/4
=28.75%
=25+5-25×5÷100
=25+5-5/4
=120-5/4
=115/4
=28.75%
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