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Toko kain "indah" menjual dua lembar kain batik de...

Toko kain "indah" menjual dua lembar kain batik dengan motif dan kualitas yang sama dengan harga begin mathsize 14px style Rp 96.000 comma negative end style. Ternyata toko tersebut mengalami kerugian sebesar begin mathsize 14px style 25 percent sign end style maka harga beli selembar kain batik adalah ....

  1. begin mathsize 14px style Rp 64.000 comma negative end style 

  2. begin mathsize 14px style Rp 70.000 comma negative end style 

  3. begin mathsize 14px style Rp 48.000 comma negative end style 

  4. begin mathsize 14px style Rp 24.000 comma negative end style 

Jawaban:

Diketahui:

begin mathsize 14px style Harga space Jual open parentheses HJ close parentheses equals Rp 96.000 comma negative percent sign straight R equals 25 percent sign end style 

Maka:

begin mathsize 14px style space space space space space space space space space space space space space space space space space percent sign straight R equals fraction numerator straight R space over denominator HB end fraction cross times 100 percent sign space space space space space space space space space space space space space space space space 25 percent sign equals fraction numerator HB minus HJ over denominator HB end fraction cross times 100 percent sign space space space space space space space space space space space space space space space space 25 over 100 equals fraction numerator HB minus 96.000 over denominator HB end fraction space space space space space space space space space space space space space space space space space space space space 1 fourth equals fraction numerator HB minus 96.000 over denominator HB end fraction 4 open parentheses HB minus 96.000 close parentheses equals HB 4 HB minus 384.000 equals HB space space space space space space space space 4 HB minus HB equals 384.000 space space space space space space space space space space space space space space space space space 3 HB equals 384.000 space space space space space space space space space space space space space space space space space space space HB equals fraction numerator 384.000 over denominator 3 end fraction space space space space space space space space space space space space space space space space space space space HB equals 128.000 end style 

Sehingga:

begin mathsize 14px style Harga space selembar space kain equals fraction numerator 128.000 over denominator 2 end fraction equals 64.000 end style 

Jadi, jawaban yang benar adalah A.

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