CXC CSEC Math Topic: Consumer Arithmetic

CXC General Proficiency Math Topic:



Percentages; profit and loss; discount; simple interest; interest and depreciation when compounded; mortgages; hire purchase; rates and taxes; insurance; currency conversion; invoices; investments; use of calculators

SPECIFIC OBJECTIVES: The student should be able to:


Calculate profit or loss as a percentage


Calculate discount, sales tax, profit or loss when these are given as a percentage;


Solve problems involving marked price (or selling price), cost price, percentage profit, loss or discount;


Solve simple problems involving payments by installments as in the case of hire purchase and mortgages;


Solve problems involving:

(a) rates and taxes

(b) utility bills

(c) invoices and shopping

(d) insurances

(e) salaries and wages

(f) investments


Calculate simple interest, principal, time, rate or amount;


Calculate compound interest, appreciation, depreciation and amount (for not more than 3 periods);


Solve problems involving simple interest, compound interest and depreciation


Solve problems involving measures and money (including exchange rate)


Use investigations to make inferences and generalizations utilizing the concepts listed above.


guest (not verified) 20 April 2009 - 1:08pm

this is heard !!!!!!!!!!!!!!!!!!!!!

guest (not verified) 2 April 2010 - 9:35pm

(1) An electricity meter reading changes from 023.456 to 024.664. The first 100 units cost 0.15 cents per unit and the remaining unit cost 0.10 cents per unit. Calculate the total amount to be paid for energy charges.

(2) The charges on a telephone bill for August 1997 include a monthly rental fee of $30 which covers the charge of 30 local calls. A charge of 0.25 cents per call is made for each local call in excess of 30 calls. The number of calls made in August was $210 and the charges for overseas calls were 284.60. A tax of 50% is payable on overseas calls. Calculate

(a) The amount due for local calls
(b) the tax on overseas calls
(c) the total amount of the telephone bill

L.CLARKE (not verified) 2 April 2010 - 11:17pm

Can anyone help me in geo sba
or tell me how its suppose to be setup

guest (not verified) 3 April 2010 - 7:16pm

Ending reading minus initial reading = 24664 - 23456 = 1208 Energy units
Cost for ist 100 units = 100 x 0.15 = $15
Cost for other units ( 1208 - 100) x 0.1 = 1108 x 0.1 = $110.80
Total cost = $110.8 = $15 = $125.80

Cost of 30 local calls = $30
Total local calls made = 210
Local Calls in excess of 30 =(210-30) = 190
Cost of additional local calls = 190x 0.25 = $47.5
Total cost of local call = 30 + 47.5 = $77.50

Cost of overseas call = $284.60
Tax on overseas calls = 284.60 x 50% = $142.30
Cost of overseas calls including Tax = $284.60 + 142.3 = $426.90

Telephone bill = $Local calls + $ overseas call = $77.5 + $426.9 = $504.40

For direct help, email:

guest (not verified) 26 September 2010 - 8:57am

Hello! :) I am a student. I really have such difficulties in mathematics especially in Hire Purchase. Could you tell me an easy way to learn it? Is there a formula?

Somehow, when I knew the answer to an easy question, the difficult ones will just come along. -,-

hi am a student in form 4 and am have problems with hire purchase and i was wondering how do you solve really heard questions about this topic?

guest (not verified) 21 June 2011 - 7:04am


guest (not verified) 25 May 2015 - 6:33pm

any know know what percentage is a grade 1

kim (not verified) 12 October 2020 - 12:35pm

how would i work out:

.first 100 units cost 40 cents each
.next 200 units cost 30 cents each
.remaining units cost 20 cents each
a) what is the cost of the 101st unit
b) what is the cost of the 301 st unit

what is the bill for a company which uses
a) 101 units b) 301 units c) 1000 units

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