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6]Penjualan (P) = Rp 2.250.000,00
%Kerugian (%R) = 10%
Pembelian (B) = ....???
%R = [(B - P)/B] × 100%
10% = [(B - 2.250.000)/B] × 100%
10% = (100B% - 2.250.000)/B
10% × B = 100B% - 2.250.000
10B% = 100B% - 2.250.000
100B% - 10B% = 2.250.000
90B% = 2.250.000
90B = 2.250.000 × 100
90B = 225.000.000
B = 225.000.000/90
B = Rp 2.500.000,00
atau
B = P / (100% - %R)
B = 2.250.000 / (100% - 10%)
B = 2.250.000 / 90%
B = 2.250.000 × 100/90
B = Rp 2.500.000,00
Jadi harga pembelian hand phone tersebut adalah Rp 2.500.000,00
7]
%Untung (%U) = 25%
Untung (U) = Rp 120.000,00
a] Pembelian (B) = ...???
b] Penjualan (P) = ...???
a]
U = %U × B
120.000 = 25% × B
B = 120.000/25%
B = 120.000 × 100/25
B = 120.000 × 4
B = Rp 480.000,00
Jadi harga pembelian barang tersebut adalah Rp 480.000,00
b]
P = B + U
P = 480.000 + 120.000
P = Rp 600.000,00
Jadi harga penjualan barang tersebut adalah Rp 600.000,00
8]
Penjualan (P) = Rp 2.500.000,00
%Untung (%U) = 25%
Pembelian (B) = ....???
B = P / (100% + %U)
B = 2.500.000 / (100% + 25%)
B = 2.500.000 / 125%
B = 2.500.000 × 100/125
B = Rp 2.000.000,00
Jadi harga pembelian sepeda tersebut adalah Rp 2.000.000,00