Jawab:
Misalkan :
Harga beli = 100
Harga jual = 100 + a
a = persentase keuntungan mula-mula
Harga beli turun 8%
Harga beli = 100 - (8% x 100)
= 100 - (8/100 x 100)
= 100 - 8
= 92
Mencari Persentase Keuntungan
800 + 100a = 92a + 920
100a - 92a = 920 - 800
8a = 120
a = 15
Jadi persentase keuntungan mula-mula adalah 15%
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Jawab:
Misalkan :
Harga beli = 100
Harga jual = 100 + a
a = persentase keuntungan mula-mula
Harga beli turun 8%
Harga beli = 100 - (8% x 100)
= 100 - (8/100 x 100)
= 100 - 8
= 92
Mencari Persentase Keuntungan
800 + 100a = 92a + 920
100a - 92a = 920 - 800
8a = 120
a = 15
Jadi persentase keuntungan mula-mula adalah 15%