Discounts & Sales
A jacket costs $80. If it is sold at 25% off, what is the sale price?
25% of 80 = 20 → Sale price = $60
A toy is bought for $50 and sold for $65. Find the profit.
65 − 50 = $15 profit
What does “P” stand for in the simple interest formula?
Principal
Define “Hire Purchase.”
Buying an item by paying a deposit plus monthly installments until it’s fully paid off.
A water bill has a fixed charge of $20 plus $2 per cubic metre. If 15 cubic metres are used, what is the bill?
20 + 30 = $50
A blender costs $320. If a 12.5% discount is given, what is the discount amount?
12.5% of 320 = 40 → Discount = $40
A book is bought for $40 and sold at a 20% loss. Find the selling price.
Loss = 8 → SP = 40 − 8 = $32
Find the simple interest on $2,000 at 5% per annum for 2 years.
I=2000×5×2÷100=$200
A fridge costs $2,000 cash. On hire purchase, you pay $500 deposit and 12 monthly payments of $150. What is the HP price?
500 + 1,800 = $2,300
A phone bill has a flat fee of $50 and $0.25 per minute. If 200 minutes are used, what is the total bill?
50 + 50 = $100
A store sells a phone for $900. After a 10% discount, VAT of 15% is added. What is the final price?
Discount = 90 → Price = 810 → VAT = 121.50 → Final = $931.50
A shopkeeper buys 60 mangoes at $2 each. She sells them all at $3 each. Find her profit.
Cost = 120 → Revenue = 180 → Profit = $60
A man invests $4,000 at 6% simple interest per annum for 3 years. Find the total amount.
I = 720 → A = 4,000 + 720 = $4,720
A washing machine costs $3,600. On hire purchase, you pay 20% deposit and 24 monthly payments of $120. How much extra do you pay compared to cash?
Deposit = 720. Installments = 2,880. HP = 3,600. Extra = 3,600 − 3,600 = $0 (same price — unusual but possible).
An electricity bill: $40 fixed, $0.75 per unit for first 100, $1.20 per unit after. If 160 units are used, what is the bill?
40 + (100 × 0.75) + (60 × 1.2) = 40 + 75 + 72 = $187
A shop marks up an item from $50 to $80. Find the percentage increase.
Increase = 30 → (30 ÷ 50) × 100 = 60%
A computer was bought for $1,200 and sold for $1,500. Find the profit percentage.
Profit = 300 → (300 ÷ 1200) × 100 = 25%
If the interest on a loan of $5,000 is $1,500 at 10% per annum, find the time.
1,500 = 5,000 × 10 × T ÷ 100 → T = 3 years
A stereo costs $2,800 cash. On hire purchase, deposit is $700 and 18 payments of $150. Find the HP price.
700 + 2,700 = $3,400
Convert US$500 to Barbados dollars if US$1 = BDS$2.
500 × 2 = BDS$1,000
A store offers “Buy 2 get 1 free” on items that cost $15 each. What is the effective discount percentage?
Cost of 3 = 45 → Pay 30 → Saving = 15 → (15 ÷ 45) × 100 = 33⅓%
A trader bought goods worth $5,000. He sold half at 25% profit and half at 10% loss. What is the overall result?
Half cost = 2,500. Profit part = 2,500 × 1.25 = 3,125. Loss part = 2,500 × 0.9 = 2,250. Total revenue = 5,375. Overall = 5,375 − 5,000 = $375 profit
At what rate of interest will $8,000 earn $1,600 in 4 years?
1,600 = 8,000 × R × 4 ÷ 100 → R = 5%
Why is hire purchase usually more expensive than paying cash?
Because interest/finance charges are added to spread payments.
A tourist exchanges BDS$1,350 to get US dollars at the rate US$1 = BDS$2.70. How many US dollars does he get?
1,350 ÷ 2.7 = US$500