This mathematics problem involves applying core mathematical principles and formulas. Below you will find a complete step-by-step solution with detailed explanations for each step, helping you understand not just the answer but the method behind it.
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You're on a roll — here are the solutions for questions 5, 6, and 7. 5. An annual salary of K31 600 had an increase of 8%. What is the new annual salary? Step 1: Calculate the amount of the increase. Increase = 8\% of K31600 Increase = (8)/(100) × 31600 Increase = 0.08 × 31600 = K2528 Step 2: Add the increase to the original salary to find the new salary. New Salary = Original Salary + Increase New Salary = K31600 + K2528 New Salary = K34128 K34128 6. An item sold at K25 is now marked at K17. What is the percentage decrease? Step 1: Calculate the amount of the decrease. Decrease Amount = Original Price - New Price Decrease Amount = K25 - K17 = K8 Step 2: Calculate the percentage decrease using the formula: Decrease AmountOriginal Price × 100\%. Percentage Decrease = (8)/(25) × 100\% Percentage Decrease = 0.32 × 100\% = 32\% 32\% 7. Winel bought twenty bags at K18 and decided to sell them at K25 each. What is Winel's total profit? Step 1: Calculate the total cost of buying twenty bags. Total Cost = Number of Bags × Cost per Bag Total Cost = 20 × K18 = K360 Step 2: Calculate the total revenue from selling twenty bags. Total Revenue = Number of Bags × Selling Price per Bag Total Revenue = 20 × K25 = K500 Step 3: Calculate the total profit. Total Profit = Total Revenue - Total Cost Total Profit = K500 - K360 = K140 K140 What's next?