1. BUSINESS MATHEMATICS
&
STATISTICS

2. Basic calculations of percentages, salaries and investments using
LECTURE 5
Review of Lecture 4
Basic calculations of percentages, salaries and investments using
Microsoft Excel

3. Find the percent change
Monday’s Sales were Rs.1000 and grew to Rs the next day
Find the percent change

4. CALCULATION Initial Value =1000 Final Value = 2500 Change = 1500
% Change = 1500/1000 x 100
= 150

7. HOW many Percent is Next Day’s sale with refernce to Monday’s Sale?
Mondays’s sale= 1000
Next day’s sale= 2500
Next day’s sale as % = 2500/1000 x 100
= 250 %
= Two and a half times

8. ow
reference

9. reference ow

10. In the making of dried fruit, 15kg. of fruit shrinks to 3 kg
Find the percent change.

11. CALCULATION Original fruit = 15 kg Final fruit = 3 kg
Change = 3-15 = -12
% change = - 12/15 x 100
= %
Size was reduced by 80%

15. After mixing with water the weight of cotton increased from 3 kg to 15 kg Find the percent change.

16. CALCULATION Original weight = 3 kg Final weight = 15 kg
Change = 15-3= 12
% change = 12/3 x 100
= 400 %
Weight increased by 400%

19. An employee is currently earning 5000 rupees per month
A union signed a three year collective agreement that provided for wage increases of 3%, 2%, and 1% in successive years
An employee is currently earning 5000 rupees per month
What will be the salary per month at the end of the of the term of the contract?

20. CALCULATION
5000(1 + 3%)(1 + 2%)(1 + 1%) =
5000 x 1.03 x 1.02 x 1.01

24. Investment for a period of 4 years
Rates of return for each year are 4%, 8%, -10% and 9% respectively. If you invested Rs. 100,000 at the beginning of the term, how much will you have at the end of the last year?

27. BUSINESS MATHEMATICS
&
STATISTICS