This animation walks through calculating the final price of shoes after two consecutive discounts, 20% then 15%, applied to an original price of Rp400,000. It shows step by step why successive discounts are not simply added together, since the second discount applies to the already reduced price. The final per-pair price is then multiplied by three to find the total cost. Useful for students learning percentage discounts and multi-step word problems in everyday finance contexts.
Narrated · 16:9 · Preview before teaching · automatic layout checks do not establish subject accuracy
Langkah 1: Menghitung harga setelah diskon 20% Harga awal sepatu adalah Rp400.000,00. \[ (100\%-20\%)\times400.000 \] \[ =80\%\times400.000 \] \[ =\boxed{Rp320.000,00} \] Langkah 2: Menghitung harga setelah diskon 15% Karena diskon kedua sebesar 15%, kita gunakan \(100\%-15\%=85\%\). \[ (100\%-15\%)\times320.000 \] \[ =85\%\times320.000 \] \[ =\frac{85}{100}\times320.000 \] \[ =\boxed{Rp272.000,00} \] Jadi, harga satu pasang sepatu setelah diskon ganda adalah Rp272.000,00. Langkah 3: Menghitung harga 3 pasang sepatu \[ 3\times272.000=\boxed{Rp816.000,00} \] Jadi, jawaban yang benar adalah A. Rp816.000,00.