Anglican High School Math Exercise 8C PDF

# 公会中学 Anglican High School ## Parents Signature: _ ## 科目 Subject: Math ## 姓名 Name: Xinner ## 班级 Class: H ## 日期 Date: 22/5/2024 ## 零号: 8 ## TB Exercise 8C ### Q7i - 7% of marked price = $49 - 1% of marked price = $49/7 = $7 - 100% of marked price = $7 x 100 = $700 (Ans) ###...

# 公会中学 Anglican High School ## Parents Signature: _ ## 科目 Subject: Math ## 姓名 Name: Xinner ## 班级 Class: H ## 日期 Date: 22/5/2024 ## 零号: 8 ## TB Exercise 8C ### Q7i - 7% of marked price = $49 - 1% of marked price = $49/7 = $7 - 100% of marked price = $7 x 100 = $700 (Ans) ### Q7ii Sale price of television set = 700 - 49 = $651 (Ans) ### Q14 - 300 articles = $1500 - 1 article = $1500/300 = $5 - 1 article 20% above cost price = 100 x 5 / 100 * 120 = $6 - 260 articles 20% above cost price = 6 x 260 = $1560 - 1 article sold 50% of each of the 260 articles = $50 x 6 / 100 = $3 - 40 articles sold 50% of each of 260 articles = 3 x 40 = $120 - Shopkeeper's profit = $1560 + $120 = $1680 - Profit = $1680 - $1500 = $180 - Find percentage = 180 / 1500 x 100% = 12% - The shopkeeper made a 12% profit. ### Q19 - 4% of her sales that month = $1220 - $500 = $720 - 1% of her sales that month = $720 / 4 = $180 - 100% of her sales that month = $180 x 100 = $18000 (Ans) ### Q 8.21 - Discounts = 18% - Service charge = 100 x (100% - 18%) / 100 = 100 x 82% = 8.2% - Get: 2100 x (100% - 18% + 8.2%) / 100 = 2100 x (100% - 9.8%) / 100 = 2100 x 90.2% / 100 = 1894.2% - ≈8.12% (3s.f.) - Total percentage = 100% - 18% + 8.2% + 8. 118% = 98.318% = 98.3% (3s.f) - 98.3% of marked price = $10.32 - 1% of marked price = $10.32 / 98.3 - Marked price = $10.32 / 98.3 x 100 = $10.50 (Ans)