This diagram covers Worked Examples within Percentage Decrease for GCSE Mathematics. Revise Percentage Decrease in Ratio & Proportion for GCSE Mathematics with 12 exam-style questions and 22 flashcards. This topic appears less often, but it can still be a useful differentiator on mixed-topic papers. It is section 4 of 5 in this topic. Focus on the labels, the relationships between parts, and the explanation that turns the diagram into an exam-ready answer.
Topic position
Section 4 of 5
Practice
12 questions
Recall
22 flashcards
🎯 Worked Examples
Example 1: Shop Discount
Problem: A laptop costs £800 with a 25% discount. What's the sale price?
Step 1: Identify the decrease = 25%
Step 2: Convert to decimal = 25 ÷ 100 = 0.25
Step 3: Find multiplier = 1 - 0.25 = 0.75
Step 4: Sale price = £800 × 0.75 = £600
Example 2: Car Depreciation
Problem: A car worth £12,000 depreciates by 18% in one year. What's its new value?
Step 1: Decrease = 18%
Step 2: Decimal = 0.18
Step 3: Multiplier = 1 - 0.18 = 0.82
Step 4: New value = £12,000 × 0.82 = £9,840
Example 3: Population Decline
Problem: A village has 2,500 residents. Population decreases by 12%. How many residents remain?
Step 1: Decline = 12%
Step 2: Decimal = 0.12
Step 3: Multiplier = 1 - 0.12 = 0.88
Step 4: Remaining population = 2,500 × 0.88 = 2,200